" Though wisdom involves the search for ultimate truth, it must be pursued with the realization that ultimately there is no absolute truth, only perception. Ambiguity, contradiction, uncertainty, even error: To be comfortable with them is the beginning of wisdom. To function and make good decisions in the face of uncertainty, unpredictability, and necessarily limited information is to acknowledge that these are intrinsic to the human condition, the conditions of our lives. To deal with them requires flexibility, and this too is a component of wisdom. To step back, constantly reevaluate, modify judgments, and be willing to admit inaccuracy and error—these test wisdom’s resolve. "

― Sherwin B. Nuland , The Art of Aging: A Doctor's Prescription for Well-Being