... cling round such symbols as have become objective and historical. We can content ourselves with such fanciful symbols as white screens and arrow-heads and pyramids of fire in regard to the organ of our research and the original protoplasmic stuff out of which this organ of research creates the world; but when it comes to the purpose of life and the meaning of life, when it comes to that unfathomable duality which is the essence of life, we require ... — The Complex Vision • John Cowper Powys
... and apes throw sticks and stones. Even insects use materials. Basic difference between man and the rest is that man gives special shapes to tools, where mainly the rest use whatever falls to hand. But all higher, organized protoplasmic life uses tools ... — Eight Keys to Eden • Mark Irvin Clifton