Life belongs to the living, and he who lives must be prepared for changes.

Science arose from poetry... when times change the two can meet again on a higher level as friends.

Nothing can be compared to the new life that the discovery of another country provides for a thoughtful person. Although I am still the same I believe to have changed to the bones.

The formation of one's character ought to be everyone's chief aim.

It is in human nature to relax, when not compelled by personal advantage or disadvantage.

The older we get the more we must limit ourselves if we wish to be active.