He who has so little knowledge of human nature as to seek happiness by changing anything but his own disposition will waste his life in fruitless efforts.

It's our nature: Human beings like success but they hate successful people.

Nature that framed us of four elements, warring within our breasts for regiment, doth teach us all to have aspiring minds.

An inexhaustible good nature is one of the most precious gifts of heaven, spreading itself like oil over the troubled sea of thought, and keeping the mind smooth and equable in the roughest weather.

Everything is the product of one universal creative effort. There is nothing dead in Nature. Everything is organic and living, and therefore the whole world appears to be a living organism.