And if you don't have your ears open, you're not going to be able to figure out what you should be doing.
“Pure mathematics is on the whole distinctly more useful than applied. For what is useful above all is technique, and mathematical technique is taught mainly through pure mathematics.”
“Men are mad most of their lives; few live sane, fewer die so. The acts of people are baffling unless we realize that their wits are disordered. Man is driven to justice by his lunacy.”