Epicurus on Happiness - Philosophy: A Guide to Happiness
Diogenes was acting on a crucial idea in Epicurus, that in order to live wisely it isn't enough just to read a philosophical argument once or twice, we need constant reminders of it, or we'll forget. When we're encouraged to go shopping by bright lights and inviting displays, we're quickly liable to lose sight of our true desires. So we have to counteract the influence of advertising by creating advertisements which say what we really do need, and that's why Diogenes put up his wall [on which the philosophy of Epicurus was inscribed].
Diogenes and Epicurus are antidotes for the frills of modern life; even though what they said dates back to 2400 years ago—which continues to amaze me.
“It is not knowledge, but the act of learning, not possession but the act of getting there, which grants the greatest enjoyment.” —Carl Friedrich Gauss
"If teaching is reduced to mere data transmission, if there is no sharing of excitement and wonder, if teachers themselves are passive recipients of information and not creators of new ideas, what hope is there for their students?" —Paul Lockhart, A Mathematician's Lament: www.maa.org/external_archive/devlin/LockhartsLament.pdf