Augustine of Hippo

However, do not think that you will always or immediately be strong, nor completely despair. That alternation of weakness and strength in the hands of God's servant Moses might have been your alternation. Sometimes you falter in temptations, but you do not succumb. He would drop his hands for a little while, but he did not fall completely. "If I said: My foot slipped; Your mercy, O Lord, supported me." Therefore, do not fear: a helper is present on the journey, the one who was not absent in Egypt as a liberator. Do not fear, undertake the way, proceed confidently. Sometimes he lowered his hands, sometimes he raised them; yet Amalek was defeated. He could rebel, yet he could not overcome.