“Power breeds certainty, and certainty has no clout against the unpredictable, whether you are playing poker or running a country.”

“I act with complete certainty. But this certainty is my own.”

“We can never establish with certainty what part of our relations with others is the result of our emotions - love, antipathy, charity, or malice - and what part is predetermined by the constant power play among individuals.”

“Certainty becomes you.”

“...we should all fortify ourselves against the dark hours of depression by cultivating a deep distrust of the certainties of despair. Despair is relentless in the certainties of its pessimism. But we have seen again and again, from our own experience and others', that absolute statements of hopelessness that we make in the dark are notoriously unreliable. Our dark certainties are not sureties.”

“Tolerance grows only when faith loses certainty; certainty is murderous.”