In order to disprove the assertion that all crows are black, one white crow is sufficient.

Man, biologically considered ... is simply the most formidable of all beasts of prey, and, indeed, the only one that preys systematically on its own kind.

Faith is synonymous with working hypothesis.

From the Vedas we learn a practical art of surgery, medicine, music, house building under which mechanized art is included. They are encyclopedia of every aspect of life, culture, religion, science, ethics, law, cosmology and meteorology.

We never fully grasp the import of any true statement until we have a clear notion of what the opposite untrue statement would be.

A little cooling down of animal excitability and instinct, a little loss of animal toughness, a little irritable weakness and descent of the pain-threshold, will bring the worm at the core of all our usual springs of delight into full view, and turn us into melancholy metaphysicians.

Truth is one species of good, and not, as is usually supposed, a category distinct from good, and co-ordinate with it