Don't judge a man by his opinions, but what his opinions have made of him.
What a blessing it would be if we could open and shut our ears as easily as we open and shut our eyes
One's first step in wisdom is to question everything - and one's last is to come to terms with everything.
The most accomplished monkey cannot draw a monkey, this only man can do; just as it is also only man who regards his ability to do this as a distinct merit
Those who never have time do least
A book is a mirror: If an ass peers into it, you can't expect an apostle to look out
Theologians always try to turn the Bible into a book without common sense
I cannot stop thinking that I died before I was born and that at my death I will return to the same state
What is the good of drawing conclusions from experience? I don't deny we sometimes draw the right conclusions, but don't we just as often draw the wrong ones?
God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.
If all mankind were suddenly to practice honesty, many thousands of people would be sure to starve
It not seldom happens that in the purposeless rovings and wanderings of the imagination we hunt down such game as can be put to use by our purposeful philosophy in its well-ordered household
The thoughts written on the walls of madhouses by their inmates might be worth publicizing.
Man loves company even if only that of a small burning candle
Nothing is more conducive to peace of mind than not having any opinion at all.
The drive to propagate our race has also propagated a lot of other things
He who is in love with himself has at least this advantage - he won't encounter many rivals.
We have no words for speaking of wisdom to the stupid. He who understands the wise is wise already.
A book is a mirror: if an ape looks into it an apostle is hardly likely to look out.
Libraries can in general be too narrow or too wide for the soul.
What I do not like about our definitions of genius is that there is in them nothing of the day of judgment, nothing of resounding through eternity and nothing of the footsteps of the Almighty.
The most dangerous of all falsehoods is a slightly distorted truth.
If we thought more for ourselves we would have very many more bad books and very many more good ones.
...if we gained only one incontestable truth every ten years from each of our philosophical writers the harvest we reaped would be sufficient.
When they have discovered truth in nature they fling it into a book, where it is even worse hands.