In practical matters the end is not mere speculative knowledge of what is to be done, but rather the doing of it. It is not enough to know about Virtue, then, but we must endeavor to possess it, and to use it, or to take any other steps that may make.
Hope for the best, be prepared for the worse. Life is shocking, but you must never appear to be shocked. For no matter how bad it is it could be worse and no matter how good it is it could be better.
In other words, a person who is fanatic in matters of religion, and clings to certain ideas about the nature of God and the universe, becomes a person who has no faith at all.