It is unwise to be too sure of one's own wisdom. It is healthy to be reminded that the strongest might weaken and the wisest might err.
The enemy of the conventional wisdom is not ideas but the march of events.
One of the greatest pieces of economic wisdom is to know what you do not know.
It is astonishing what force, purity, and wisdom it requires for a human being to keep clear of falsehoods.
In particular, for younger researchers on whom the future of mankind may depend. We believe that they are working with all the scientific wisdom at their disposal for the preservation of the inheritance of the earth and for the lasting survival of mankind.
A poem begins in delight and ends in wisdom.
The figure a poem makes. It begins in delight and ends in wisdom... in a clarification of life - not necessarily a great clarification, such as sects and cults are founded on, but in a momentary stay against confusion.
Just as a cautious businessman avoids investing all his capital in one concern, so wisdom would probably admonish us also not to anticipate all our happiness from one quarter alone.
Those who govern, having much business on their hands, do not generally like to take the trouble of considering and carrying into execution new projects. The best public measures are therefore seldom adopted from previous wisdom, but forced by the occasion.
The doors of wisdom are never shut.
The doorstep to the temple of wisdom is a knowledge of our own ignorance.
Wisdom too often never comes, and so one ought not to reject it merely because it comes late.
Irony is the gaiety of reflection and the joy of wisdom.
I prefer the folly of enthusiasm to the indifference of wisdom.
While many of us never knew Ronald Reagan personally, we felt close to him because we shared his lighthearted sense of humor, admired his uncommon virtue, and were moved by his remarkable wisdom.