Two great virtues . . . give a man power with the heavens - integrity and purity of character. Let a man possess these, let his heart be true and unflinching, let his life be pure, and, if we add to these humility, he is protected against a multitude of weaknesses and can resist a host of temptations. We all have our weaknesses; God has permitted them that we might be taught humility in ourselves and charity towards others.
