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The principles of logic and mathematics are true simply because we never allow them to be anything else. A.J. Ayer
In the end, it's not the years in your life that count. It's the life in your years. Abraham Lincoln
Could one not imagine oneself in a state which compares to being awake, just as wakefulness compares to being asleep? Being awake would be like the dreams of that state, which in turn would show that the illusion (of the certainty) of rational knowledge is nothing but vain imagination. Al-Ghazali
The popular view that scientists proceed inexorably from well-established fact to well-established fact, never being influenced by any improved conjecture, is quite mistaken. Alan M. Turing
(Computing Machinery and Intelligence)
At any street corner the feeling of absurdity can strike any man in the face. Albert Camus
Don't walk behind me, I may not lead. Don't walk in front of me, I may not follow. Just walk beside me and be my friend. Albert Camus
If there is a sin against life, it consists perhaps not so much in despairing of life as in hoping for another life and in eluding the implacable grandeur of this life. Albert Camus
(Lyrical and Critical Essays)
Fear and stupidity has always been the basis of most human actions. Albert Einstein
Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world. Albert Einstein
The most beautiful thing we experience is the mysterious. It is the source of all art and science. Albert Einstein
As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality. Albert Einstein
Ethical axioms are found and tested not very differently from the axioms of science. Truth is what stands the test of experience. Albert Einstein
There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle. Albert Einstein
It was, of course, a lie what you read about my religious convictions, a lie which is being systematically repeated. I do not believe in a personal God and I have never denied this but have expressed it clearly. If something is in me which can be called religious then it is the unbounded admiration for the structure of the world so far as our science can reveal it. Albert Einstein
The distincition between past, present and future is only an illusion, even if a stubborn one. Albert Einstein
A person starts to live when he can live outside himself. Albert Einstein
Common sense is the collection of prejudices acquired by age eighteen. Albert Einstein
It was the experience of mystery -- even if mixed with fear -- that engendered religion. Albert Einstein
Scientists were rated as great heretics by the church, but they were truly religious men because of their faith in the orderliness of the universe. Albert Einstein
The intuitive mind is a sacred gift and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift. Albert Einstein
An optimist is a person who sees a green light everywhere, while a pessimist sees only the red stoplight. The truly wise person is colorblind. Albert Schweitzer
Happiness is not achieved by the conscious pursuit of happiness; it is generally the by-product of other activities. Aldous Huxley
After silence, that which comes nearest to expressing the inexpressible is music. Aldous Huxley
There are two ways to slide easily through life: to believe everything or to doubt everything; both ways save us from thinking. Alfred Korzybski
We think in generalities, but we live in detail. Alfred North Whitehead