Sleeping is no mean art: for its sake one must stay awake all day.

No small art is it to sleep: it is necessary for that purpose to keep awake all day

No small art is it to sleep: it is necessary for that purpose to keep awake all day.

He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.

The most instructive experiences are those of everyday life

When one has a great deal to put into it a day has a hundred pockets.