“We ought also to pray, whenever we commence any undertaking, that he may not permit us to fail in the midst of our efforts, or at the beginning of the work, but may supply us with strength from heaven till the end. Conviction of our weakness ought not, indeed, to be a reason for indolence, to prevent us from going wherever God calls us; but it ought to restrain our rashness, that we may not attempt any thing beyond our calling; and it ought also to stimulate us to prayer, that God, who has given us grace to begin well, may also continue to give us grace to persevere.”
John Calvin and William Pringle, Commentary on a Harmony of the Evangelists Matthew, Mark, and Luke, vol. 3 (Bellingham, WA: Logos Bible Software, 2010), 260–261.