God has promised
“But the Scripture has confined all under sin that the promise by faith in Jesus Christ might be given to those who believe.” Galatians 3:22
Let us turn to the story of the paralytic at Bethesda. The poor sufferer was helpless; he had not used his limbs for thirty-eight years. Yet Jesus bade him, “Rise, take up thy bed, and walk.” The sick man might have said, “Lord, if Thou wilt make me whole, I will obey Thy word.” But, no, he believed Christ’s word, believed that he was made whole, and he made the effort at once; he willed to walk, and he did walk. He acted on the word of Christ, and God gave the power. He was made whole.
In like manner you are a sinner. You cannot atone for your past sins; you cannot change your heart and make yourself holy. But God promises to do all this for you through Christ. You believe that promise. You confess your sins and give yourself to God. You will to serve Him. Just as surely as you do this, God will fulfil His word to you. If you believe the promise,—believe that you are forgiven and cleansed,—God supplies the fact; you are made whole, just as Christ gave the paralytic power to walk when the man believed that he was healed. It is so if you believe it.
Do not wait to feel that you are made whole, but say, “I believe it; it is so, not because I feel it, but because God has promised…” A call to Stand Apart p. 30.2, 3, 4