Mix brains with your business. Like the opium or chloral slave you will
be able to endure a larger quantity each day, and the effect will not
be darkness and death, but light and life. Simply because you think you
can do a thing is no great sign you can do it. You must have brains and
probabilities in your favor. You must absolutely have done something
very nearly like it. I never saw a more signal instance of the general
self-conceit of the race than in the experience of a young man who once
sold a little rubber reed which he laid on his tongue, and with which