Dogs get lost hundreds of times and no one ever notices it or sends an account of it to a scientific magazine.

Colors fade, temples crumble, empires fall, but wise words endure.

The dog, on the other hand, has few or no ideas because his brain acts in coarse fashion and because there are few connections with each single process.

Amongst the minds of animals that of man leads, not as a demigod from another planet, but as a king from the same race.

From the lowest animals of which we can affirm intelligence up to man this type of intellect is found.

So the animal finally performs in that situation only the fitting act.

Human beings are accustomed to think of intellect as the power of having and controlling ideas and of ability to learn as synonymous with ability to have ideas. But learning by having ideas is really one of the rare and isolated events in nature.