The philosophers have only interpreted the world; the thing, however, is to change it.

Karl Marx.

Change is not made without inconvenience, even from worse to better.

Richard Hooker

Everyone thinks of changing humanity and nobody thinks of changing himself.

Leo Tolstoy

Nothing is permanent except change.

Heraclitus

Man is so made that he can only find relaxation from one kind of labor by taking up another.

Anatole France