Science, art, learning and metaphysical research all have their proper functions in life, but if you seek to blend them, you destroy their individual characteristics until, in time, you eliminate the spiritual, for instance, from the religious altogether.
You all know that certain things are necessary to make a religion. First of all, there is the book. The power of the book is simply marvellous! Whatever it be, the book is the centre round which human allegiance gathers. Not one religion is living today but has a book. With all its rationalism and tall talk, humanity still clings to the books. In your country every attempt to start a religion without a book has failed. In India sects rise with great success, but within a few years they die down, because there is no book behind them. So in every other country.
Religion has become to many merely a means of doing a little charity work, just to amuse them after a hard day's labour - they get five minutes religion to amuse them. This is the danger with the liberal thought.
A sapling must be hedged about for protection, but when it becomes a tree, a hedge would be a hindrance. So there is no need to criticise and condemn the old forms.
The test of ahimsa is the absence of jealousy. The man whose heart never cherishes even the thought of injury to anyone, who rejoices at the prosperity of even his greatest enemy, that man is the bhakta, he is the yogi, he is the guru of all.
The only religion that ought to be taught is the religion of fearlessness. Either in this world or in the world of religion, it is true that fear is the sure cause of degradation and sin. It is fear that brings misery, fear that brings death, fear that breeds evil. And what causes fear? Ignorance of our own nature.