While the laughter of joy is in full harmony with our deeper life, the laughter of amusement should be kept apart from it. The danger is too great of thus learning to look at solemn things in a spirit of mockery, and to seek in them opportunities for exercising wit.
It is not likely that posterity will fall in love with us, but not impossible that it may respect or sympathize; so a man would rather leave behind him the portrait of his spirit than a portrait of his face.
Every man is to be respected as an absolute end in himself; and it is a crime against the dignity that belongs to him as a human being, to use him as a mere means for some external purpose.
The scientist is activated by a wonder and awe before the mysterious comprehensibility of the universe which is yet finally beyond his grasp. In its profoundest depths it is inaccessible to man.