We have already demonstrated above that man is entirely incapable of converting himself Allow me to make you acquainted with yourself, your inability, as well as that your refraining from evil and doing good is of no value before God. Allow me briefly to convey to you what true conversion is. Some imagine that conversion consists in refraining from the commission of gross sins and in the performance of some good deeds. Conversion, however, is a complete change of man as far as his spiritual frame, intellect, will, thoughts, words, and deeds are concerned. This change can be compared with a person born blind receiving his sight, a deaf person being enabled to hear, a dumb person being enabled to speak, or a totally paralyzed person being enabled to move about. The Holy Spirit is given to the person who is to be converted, who, having made His residence in the soul, reveals to the soul how polluted it is from every perspective, causing the soul to detest and abhor itself, to be filled with shame, to be humbled, and to be perplexed concerning its condition. In addition to this the Holy Spirit reveals God to the soul as being holy, majestic, just, good, and a God of truth. He reveals to the soul the necessity and the fullness of the Mediator and grants him some understanding as to how he can be reconciled and united to God. He works love and fear for, and obedience towards, God. How precious this becomes to the soul, causing him to betake himself to the Mediator Jesus, to receive these matters out of His fullness! This produces grief and sorrow over the fact that the soul cleaves to all that is before the eyes and cleaves to sin—both the great as well as the small sins, both external and internal sins. Now he perceives and is conscious of all these sins of which previously he took no notice. Such a soul now seeks to exercise communion with God and desires to be near Him. The soul is either joyful or sorrowful in relation to whether he is far from God or close to Him. His disposition is one in which his back is turned the world and sin, even though he is frequently ensnared by them. He lives focused upon God, and even though all is darkness, he looks to Him for light, life, spirituality, comfort, strength to do battle against sin, as well as for holiness. Such a soul is not satisfied with mere performance. He knows that he must perform good works, but wishes to do so by faith, in union with Christ, and through Him unto God, doing so in the presence of the Lord out of love to God, in the fear of God, in obedience to God, and with denial of self.
Source: Wilhelmus à Brakel – Dutch theologian from the late 1600s