How can you know you are brave if you never face danger? How can you know you are a man or woman of peace if you are never tempted to war? And how can you call yourself pure if you have never resisted the lusts of the flesh?
Thus we must face these temptations if we are to know ourselves. But the important thing about temptation is to resist rather than succumb. That is not to say you will succeed at first, there is no Victory without Struggle, and the struggle of Life is great. But like the fables of knights of old, one must persist in his quest until the great goal is achieved, and the Holy Grail of life attained.