“Smile is the vainest thing you can wear without costing you anything”

“The land of easy mathematics where he who works adds up and he who retires subtracts.”

“At the age of 45, most days in Tucson were spent feeling like I was on the summit of Mauna Kea, as I was exhibiting debilitating health symptoms that corresponded to what I saw at very high altitud...”

“The hour is only long thus, if you've waited.”

“To the immature, other people are not real.”

“Continuously feeling superior is a characteristic of immaturity.”

“Self appreciation is a sign of maturity, seeking appreciation is a sign of immaturity”