Instinct

There is no instinct like that of the heart.

Who speaks to the instincts speaks to the deepest in mankind, and finds the readiest response.

Most mothers are instinctive philosophers

There are many definite methods, honest and dishonest, which make people rich; the only ''instinct'' I know of which does it is that instinct which theological Christianity crudely describes as ''the sin of avarice"

The very essence of instinct is that it's followed independently of reason

We must, however, acknowledge, as it seems to me, that man with all his noble qualities... still bears in his bodily frame the indelible stamp of his lowly origin.