Hegel was right when he said that we learn from history that man can never learn anything from history.
—George Bernard Shaw
I never guess. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.
—Arthur Conan Doyle
A learned blockhead is a greater blockhead than an ignorant one.
Nothing can be so amusingly arrogant as a young man who has just discovered an old idea and thinks it is his own.
—Sidney J. Harris
Some people will never learn anything because they understand everything too soon.
A censor is a man who knows more than he thinks you ought to.
The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it.
The body has its own way of knowing, a knowing that has little to do with logic, and much to do with truth; little to do with control, and much to do with acceptance; little to do with division and analysis, and much to do with union.
Exchange ideas frequently.
—James Cash Penney
Everybody knows how to raise children, except the people who have them.
There are only two kinds of people who are really fascinating: people who know absolutely everything, and people who know absolutely nothing.
The only thing that makes life possible is permanent, intolerable uncertainty; not knowing what comes next.
—Ursula K. Le Guin
I am always ready to learn although I do not always like being taught.
A man lives with himself for seventy years, and doesn't know who he is.
—Israel Salanter Lipkin
Is it really so difficult to tell a good action from a bad one? I think one usually knows right away or a moment afterward, in a horrid flash of regret.