With happiness as with health: to enjoy it, one should be deprived of it occasionally.

One's native land! There should one live! There die!

Man's constitution is so peculiar that his health is purely a negative matter. No sooner is the rage of hunger appeased than it becomes difficult to comprehend the meaning of starvation. It is only when you suffer that you really understand.

When science has sent forth her fiat - it is only to hear and obey.

'Movement is life;' and it is well to be able to forget the past, and kill the present by continual change.

In presence of Nature's grand convulsions, man is powerless.