M. C. Escher He who wonders discovers that this in itself is wonder. As for the passions and studies of the mind, avoid envy, anxious fears, anger fretting inwards, subtle and knotty inquisitions, joys and exhilarations in excess, sadness not communicated. Johann Georg von Zimmermann Be not so bigoted to any custom as to worship it at the expense of Truth. A man can fail many times, but he isn't a failure until he begins to blame somebody else. It is difficult to live in the present, ridiculous to live in the future, and impossible to live in the past.
Nothing is as far away as one minute ago.
Therefore do not be anxious about tomorrow, for tomorrow will be anxious for itself. Sufficient unto the day is its own troubles. He felt that his whole life was some kind of dream and he sometimes wondered whose it was and whether they were enjoying it.