Constant development is the law of life, and a man who always tries to maintain his dogmas in order to appear consistent drives himself into a false position.
The purpose of life is undoubtedly to know oneself. We cannot do it unless we learn to identify ourselves with all that lives. The sum-total of that life is God.
A thousand candles can be lighted from the flame of one candle, and the life of the candle will not be shortened. Happiness can be spread without diminishing that of yourself.