He who knows all the answers has not been asked all the questions.
Being strong does not mean that you never fall down, but that whenever you fall, you get up again.
There is one word which may serve as a rule of practice for all one's life -reciprocity.
A true gentleman makes demands upon himself but not upon others.
Who heeds not the future will find sorrow at hand
The end of the day is near when small men make long shadows.