Jason E. Vickers states that Wesley's 'conversion experience' in 1738 had a clear impact on his doctrine, especially doctrine concerning the power of the Holy Spirit. The change was most prominent in his hymns written after the same year. From his published work "Hymns and Prayers to the Trinity" and in Hymn number 62 he writes "The Holy Ghost in part we know, For with us He resides, Our whole of good to Him we owe, Whom by His grace he guides, He doth our virtuous thoughts inspire, The evil he averts, And every seed of good desire, He planted in our hearts." Charles communicates several doctrines: the personal indwelling of the Holy Spirit, the sanctifying work of the Spirit, the depravity of mankind, and humanity's personal accountability to God.