When Darwin published his conclusion that man was descended from an apelike ancestor who was again descended from a still lower type, most people were shocked by the thought; it was intensely repugnant to their feelings.
If you think you can do it, you can.
All birds are incipient or would-be songsters in the spring. I find corroborative evidence of this even in the crowing of the cock.
Life is a struggle, but not a warfare.
Without the emotion of the beautiful, the sublime, the mysterious, there is no art, no religion, no literature.
If we take science as our sole guide, if we accept and hold fast that alone which is verifiable, the old theology must go.