"A scientific man ought to have no wishes, no affections, - a mere heart of stone" — Charles Robert Darwin

Four seasons fill the measure of the year; there are four seasons in the mind of man

Source: The Human Seasons (1818)

Talking with a friend is nothing else but thinking aloud

Source: The Spectator, no. 225 (1711)

I am certain of nothing but the holiness of the heart's affections, and the truth of imagination.

Source: Letters of John Keats (1817-1820)

Reading is to the mind what exercise is to the body

Source: The Tatler, no. 147 (1710)

My imagination is a monastery and I am its monk

Source: Letters of John Keats (1817-1820)

There is no charm equal to tenderness of heart

Source: Emma (1815)

Charles Robert Darwin Quote