There are two things which make it impossible to believe that this world is the successful work of an all-wise, all-good, and at the same time, all-powerful being; firstly, the misery which abounds in it everywhere; and secondly, the obvious imperfection of its highest product, man, who is a burlesque of what he should be.

There is only one inborn erroneous notion ... that we exist in order to be happy ... So long as we persist in this inborn error ... the world seems to us full of contradictions. For at every step, in great things and small, we are bound to experience that the world and life are certainly not arranged for the purpose of maintaining a happy existence ... hence the countenances of almost all elderly persons wear the expression of ... disappointment.

Opinion is like a pendulum and obeys the same law.

A man finds himself, to his great astonishment, suddenly existing, after thousands and thousands of years of non-existence: he lives for a little while; and then, again, comes an equally long period when he must exist no more. The heart rebels against this, and feels that it cannot be true.

Compassion for animals is intimately associated with goodness of character, and it may be confidently asserted that he who is cruel to animals cannot be a good man.

Many undoubtedly owe their good fortune to the circumstance that they possess a pleasing smile with which they win hearts. Yet these hearts would do better to beware and to learn from Hamlet's tables that one may smile, and smile, and be a villain.

To conceal a want of real ideas, many make for themselves an imposing apparatus of long compound words, intricate flourishes and phrases, new and unheard-of expressions, all of which together furnish an extremely difficult jargon that sounds very learned. Yet with all this they say-precisely nothing.