“As a rule of thumb, I would submit that if you need to call your floss provider, for any reason, you are probably not ready for this level of oral hygiene.”

“Rule of thumb: if you think something is clever and sophisticated beware-it is probably self-indulgence.”

“The teeth of the smile evidenced a clinical depressive’s classic inattentionto oral hygiene.”

“There's one rule of thumb that suggests that you need one day of recovery for every mile run in a race. Another rule of thumb...suggests one day...for every kilometer run in anger.”

“A good rule of thumb is that any environment that consistently leaves you feeling bad about who you are is the wrong environment.”

“Respect for humanity! Respect for humanity! If such respect is rooted in the human heart, humanity will eventually establish a social, political, or economic system that reflects it. A civilization is before all else rooted in its substance. At first this was a blind urge for warmth. Then by trial and error man found the way to the fire.That is probably why, my friend, I have such need of your friendship. I need a companion who - beyond the struggles of reason - respects in me the pilgrim on his way to that fire. I sometimes need to feel the promised warmth ahead of time and to rest somewhere beyond myself in that meeting place that will be ours. [...] Beyond the clumsiness of my words, beyond my defective reasoning, you are ready to see me as a human being. You are ready to honor in me the representative of beliefs, customs, loves. If I differ from you, far from wronging you, I enrich you. You question me as you would a traveler.”