Ignorance more frequently begets confidence than does knowledge.

Only the fittest will survive.

Jealousy was plainly exhibited when I fondled a large doll, and when I weighed his infant sister, he being then 15? months old. Seeing how strong a feeling of jealousy is in dogs, it would probably be exhibited by infants at any earlier age than just specified if they were tried in a fitting manner

It is like confessing to a murder.

How fleeting are the wishes and efforts of man! how short his time! and consequently how poor will his products be, compared with those accumulated by nature during whole geological periods. Can we wonder, then, that nature's productions should be far 'truer' in character than man's productions; that they should be infinitely better adapted to the most complex conditions of life, and should plainly bear the stamp of far higher workmanship?

One general law, leading to the advancement of all organic beings, namely, multiply, vary, let the strongest live and the weakest die.

Worms have played a more important part in the history of the world than humans would at first suppose.