We may climb into the thin and cold realm of pure geometry and lifeless science, or sink into that of sensation. Between these extremes is the equator of life, of thought, or spirit, or poetry,--a narrow belt.
It is frivolous to fix pedantically the date of particular inventions. They have all been invented over and over fifty times. Man is the arch machine, of which all these shifts drawn from himself are toy models. He helps himself on each emergency by copying or duplicating his own structure, just so far as then need is.
The case wouldn't be overweight if you didn't have so many shoes. How many do you really need? This pair, for example, I swear you never even wore them.
Life is in short cycles or periods; we are quickly tired, but we have rapid rallies. A man is spent by his work, starved, prostrate; he will not lift his hand to save his life; he can never think more. He sinks into deep sleep and wakes with renewed youth, with hope, courage, fertile in resources, and keen for daring adventure.