I cannot say whether things will get better if we change; what I can say is they must change if they are to get better.
Once we know our weaknesses they cease to do us any harm.
We have no words for speaking of wisdom to the stupid. He who understands the wise is wise already.
One's first step in wisdom is to question everything - and one's last is to come to terms with everything.
It often takes more courage to change one's opinion than to stick to it.
There are very many people who read simply to prevent themselves from thinking.
I ceased in the year 1764 to believe that one can convince one’s opponents with arguments printed in books. It is not to do that, therefore, that I have taken up my pen, but merely so as to annoy them, and to bestow strength and courage on those on our own side, and to make it known to the others that they have not convinced us.
Honor is infinitely more valuable than positions of honor.
Nothing reveals a man's character better than the kind of joke at which he takes offense.
We accumulate our opinions at an age when our understanding is at its weakest.
Love is blind, but marriage restores its sight.
Diogenes, filthily attired, paced across the splendid carpets in Plato's dwelling. Thus, said he, do I trample on the pride of Plato. Yes, Plato replied, but only with another kind of pride.
Marriage, in contrast to the flu, starts with a fever and ends with the chills.
Even truth needs to be clad in new garments if it is to appeal to a new age.
The greatest events occur without intention playing any part in them; chance makes good mistakes and undoes the most carefully planned undertaking. The world's greatest events are not produced, they happen.
You can make a good living from soothsaying but not from truthsaying.
Ask yourself always: how can this be done better?
The most dangerous untruths are truths slightly distorted.
The feeling of health can only be gained by sickness.
Nothing puts a greater obstacle in the way of the progress of knowledge than thinking that one knows what one does not yet know.
To do just the opposite is also a form of imitation.
The greater part of human misery is caused by indolence.
A book is a mirror: if an ape looks into it an apostle is hardly likely to look out.
One must judge men not by their opinions, but by what their opinions have made of them.
Erudition can produce foliage without bearing fruit.
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