When the Mountain Won't Move
There are moments in life when the burden feels too heavy to bear alone. You may find yourself kneeling before God, begging for mercy for a loved one, a failing marriage, a terminal diagnosis, or a financial situation that seems utterly beyond repair. In those quiet, desperate hours, when the heavens seem like brass and your prayers feel as though they bounce off the ceiling, it is natural to ask why the breakthrough has not yet come. We look at the mountain standing immovably before us, and our hearts sink under the weight of fear and exhaustion.
The disciples in Matthew 17 faced a similar moment of deep frustration and public failure. They had been given authority to cast out unclean spirits and heal sicknesses, yet they stood before a desperate father, completely unable to deliver his demon-tormented boy. It is easy to feel discouraged when our own strength, theological training, and personal strategies fail to bring the healing and deliverance we crave. We ask ourselves, "Why could we not cast him out?"
When the father brought his son to Jesus, the Savior did not scold the father for his agonizing pain, nor did He ignore the gravity of the situation. Instead, He addressed the root of the spiritual paralysis gripping both the crowd and His disciples: unbelief. He reminded them that the power to overcome the impossible does not originate from human effort, religious ritual, or self-generated confidence, but from a living faith rooted in His unchanging character.
Then Jesus answered and said, O faithless and perverse generation, how long shall I be with you? how long shall I suffer you? bring him hither to me.— Matthew 17:17, KJV
In this sharp rebuke, Christ points us away from human failure and directs us to Himself: "Bring him hither to me." The starting point of trusting God fully is the total surrender of our problems into the hands of the Lord Jesus Christ. We must stop trying to manage the mountain in our own strength and instead bring the burden directly to the feet of the Savior.
The Anatomy of Unbelief
To understand how to trust God fully, we must first examine what hinders our trust. When the disciples asked Jesus privately why they failed, His answer was direct and uncompromising:
And Jesus said unto them, Because of your unbelief: for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible unto you.— Matthew 17:20, KJV
In the Greek text, the word used for "unbelief" is apistia, which denotes a lack of faith, unfaithfulness, or a refusal to trust. Jesus did not say they failed because they did not try hard enough, or because they lacked the proper credentials. They failed because of their unbelief. They had allowed the terrifying symptoms of the boy's possession to eclipse their view of God's sovereign power.
Unbelief is not merely an intellectual struggle; it is a spiritual posture that looks at the circumstances instead of looking at the Creator. When we allow our problems to grow larger in our minds than the promises of God, unbelief takes root. We begin to rely on our own understanding, our own resources, and our own timelines. This is the essence of legalistic, fleshly religion—trying to accomplish by human effort what can only be wrought by the Holy Spirit through a born-again relationship with Jesus Christ.
The Power of a Mustard Seed Faith
Trusting God fully does not require a mountain-moving faith in its size, but in its object. Jesus used the illustration of a grain of mustard seed—one of the smallest, most insignificant seeds known to the agrarian society of His day. A mustard seed is tiny, fragile, and easily overlooked, yet it holds the miraculous principle of life within its shell. When planted, it grows into a great tree that provides shelter and strength.
Similarly, our trust in God is not about the volume of our confidence, the emotional intensity of our prayers, or the perfection of our spiritual walk. It is about the reality and reliability of His faithfulness. A tiny, trembling faith placed in an infinite, almighty God can move mountains; whereas a massive, self-assured faith placed in human ability will utterly fail when the storms of life hit.
When you wonder how to trust God fully, remember that He is present in the very midst of your struggle. He rebuked the devil, and the child was cured from that very hour. His word is active, living, and powerful, capable of bringing divine order to our chaos and heavenly light to our deepest darkness. In hard times, faith is a conscious choice to believe in who God is, as revealed in His Holy Word, even when we cannot see where He is leading us. It is the quiet, daily surrender that says, "Lord, I cannot do this, but You can."
Four Biblical Steps to Trusting God Fully
How do we translate this theological truth into our daily walk? The Scriptures provide a clear, practical pathway to anchor our souls in Christ during times of trial.
1. Abandon Self-Reliance and Lean on His Word
To trust God fully, we must intentionally stop leaning on our own limited understanding. Our human intellect, while a gift from God, is fallen and cannot comprehend the vast, eternal purposes of God's sovereign will.
Trust in the LORD with all thine heart; and lean not unto thine own understanding. In all thy ways acknowledge him, and he shall direct thy paths.— Proverbs 3:5-6, KJV
The Hebrew word for "lean" means to support oneself, as if resting your entire weight upon a staff. When we lean on our own understanding, we are resting our eternal security and daily peace on a broken reed. To trust Him with "all thine heart" means leaving no room for backup plans or self-made safety nets. We must acknowledge Him in every decision, submitting our desires to His perfect will.
2. Feed Your Faith with the Scriptures
Faith is not something we can manufacture through positive thinking or emotional hype. True, saving, and sustaining faith is birthed and nourished by the Holy Scriptures.
So then faith cometh by hearing, and hearing by the word of God.— Romans 10:17, KJV
If you find your faith wavering, examine what you are consuming. Are you filling your mind with the hopeless reports of the world, or are you saturating your soul in the immutable promises of the King James Bible? To trust God fully, you must know Him intimately, and He has revealed His character, His covenants, and His love through His written Word.
3. Bring Your Honest Weakness to the Savior
God does not demand that we present a facade of flawless strength. He knows our frame; He remembers that we are dust. He invites us to be completely honest about our doubts and fears.
And straightway the father of the child cried out, and said with tears, Lord, I believe; help thou mine unbelief.— Mark 9:24, KJV
This is one of the most beautiful prayers in all of Scripture. The father did not hide his struggle; he confessed his faith and his unbelief simultaneously. Jesus did not reject him for his weakness; He met him in his honesty and healed his son. Bring your tears, your doubts, and your trembling faith to Jesus. He is touched with the feeling of our infirmities.
4. Fix Your Eyes on the Finished Work of Christ
We must look away from our circumstances, away from our failures, and even away from our own faith, and look solely to the Lord Jesus Christ.
Looking unto Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God.— Hebrews 12:2, KJV
Our faith begins in Him, is sustained by Him, and will be perfected by Him. When we look at the cross, we see the ultimate proof of His love and trustworthiness. If He did not spare His own Son, but delivered Him up for us all, how shall He not with Him also freely give us all things?
Frequently Asked Questions About Trusting God
What does it mean to trust God with all your heart?
Trusting God with all your heart means total, unreserved surrender. It is a conscious decision to rely entirely on His character, His wisdom, and His Word, rather than your own feelings, circumstances, or intellect. It means holding nothing back—giving Him control over your family, your career, your finances, and your future, believing that His plans for you are good.
Why does God allow trials if we are trusting Him?
God does not promise a life free from trouble, but He promises to be with us in the midst of it. Trials are the testing ground of faith. Just as gold is refined in the fire to remove impurities, our faith is tried and strengthened through afflictions. Trusting God in the dark proves the reality of our born-again relationship with Him and brings glory to His name.
How do I rebuild my trust in God after a deep disappointment?
Rebuilding trust begins with running to God, not away from Him. Pour out your grief and confusion honestly before Him, just as the psalmists did. Remember that God's silence is not His absence, and His delays are not His denials. Return to the foundational truths of the Gospel: Christ died for you, He loves you, and He is working all things together for your ultimate good and His eternal glory.
Resting in His Faithfulness
You are not alone in your doubt, your fear, or your pain. Jesus invites you to bring your heavy burdens directly to Him today, for He is patient with your weakness and rich in mercy. As you lean into His presence, let your faith grow like that small mustard seed, anchoring your soul in the absolute truth that nothing is impossible for God.
Trusting God fully is not a legalistic burden or a religious performance; it is the sweet rest of a child in the arms of a loving Father. It is a daily walk of grace, sustained by a personal, born-again relationship with the Lord Jesus Christ. Trust Him fully today, for He who promised is faithful, and He will surely bring it to pass.
In His Grace,
Grace — Faith Companion