Just as a stream flows smoothly on as long as it encounters no obstruction, so the nature of man and animal is such that we never really notice or become conscious of what is agreeable to our will; if we are to notice something, our will has to have been thwarted, has to have experienced a shock of some kind.
Arthur SchopenhauerIt is not what things are objectively and in themselves, but what they are for us, in our way of looking at them, that makes us happy or the reverse.
Arthur Schopenhauer