A dose of realism

In the first place, everyone must be convinced that neither all natural or acquired abilities, nor all supernatural gifts or perfect knowledge of the Scriptures, nor even whole ages spent in the service of his Creator, can enable him to do the will of God. He cannot perform his duty unless the Hand of the Almighty sustains him as often as any good action is to be done, temptation to be overcome, dangers to be avoided, or crosses to be borne according to the Will of God. This truth must be kept in mind every day, hour, and moment of his life. In this way he will lose all presumption and will never rashly trust in himself.