Chapter 3 — Part I: The Creed — Article I: I Believe in God, the Father Almighty, Creator of Heaven and Earth
Section 35. Advantages Of Faith In God's Omnipotence — With this faith, then, we should be specially fortified whenever we are required to render any extraordinary service to our neighbour or seek to obtain by prayer any favour from God. Its necessity in the one case we learn from the Lord Himself, who, when rebuking the incredulity of the Apostles, said: If you have faith as a grain of mustard seed, you shall say to this mountain: Remove from hence thither, and it shall remove; and nothing shall be impossible to you; and in the other case, from these words of St. James: Let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea, which is moved and carried about by the wind. Therefore let not that man think that he shall receive any thing of the Lord.