One of the clearest marks of spiritual growth is that we become increasingly suspicious of our own strength. In the beginning, we often imagine that maturity will make us feel stronger, more capable, and less dependent. Over time, God teaches us something far deeper. We begin to see how much weakness has always been there, how deeply sin still reaches into the heart, and how completely we depend upon Christ for every act of obedience. Jesus said it plainly: “Apart from Me you can do nothing” (John 15:5).
This does not mean that sanctification produces no real change. Grace truly transforms us. Sin is mortified, obedience grows, desires are renewed, and the fruit of the Holy Spirit becomes increasingly visible. Yet as the light of Scripture reaches further into us, we also become more aware of motives, pride, unbelief, selfishness, and corruption that once escaped our notice. A growing Christian does not become comfortable with himself. He becomes more amazed that God continues to show mercy to him.
Paul understood this deeply. After years of extraordinary ministry, suffering, revelation, and usefulness, he was still being taught dependence. Christ told him, “My grace is sufficient for you, for power is perfected in weakness” (2 Corinthians 12:9). Paul could therefore say, “When I am weak, then I am strong” (2 Corinthians 12:10). His weakness had become the place where the sufficiency of Christ was made unmistakably clear.
This is why genuine maturity makes boasting increasingly difficult. The further we walk with God, the harder it becomes to take credit for anything good in us. Paul looked at his own labour and said, “By the grace of God I am what I am,” and then added that although he labored greatly, “yet not I, but the grace of God with me” (1 Corinthians 15:10). He worked. He suffered. He obeyed. Yet underneath all of it he saw the sustaining hand of grace.
There is something deeply humbling about realizing that every step forward has depended upon God from beginning to end. The desire to obey Him, the strength to resist sin, the hunger for His Word, the perseverance to continue, and every trace of holiness in us are fruits of His work. “For it is God who is at work in you, both to will and to work for His good pleasure” (Philippians 2:13).
So spiritual growth should leave us increasingly grateful, increasingly prayerful, and increasingly dependent upon Christ. The mature believer has learned enough about his own heart to know that self confidence is dangerous ground. He looks back and sees grace behind every victory, mercy behind every recovery, and Christ beneath every step that kept him from falling. The nearer we come to Him, the less room remains for boasting and the more natural it becomes to say, “To Him be the glory forever. Amen” (Romans 11:36).