In honor of Darwin Day, here is a reminder that even famous brilliant people have bad days. On October 1, 1861, Darwin concluded a letter to Charles Lyell by writing:
But I am very poorly today & very stupid & hate everybody & everything. One lives only to make blunders.— I am going to write a little Book for Murray on orchidsf8 & today I hate them worse than everything so farewell & in a sweet frame of mind, I am | Ever yours | C. Darwin
Despite the teen angst in Darwin’s letter, he was 51 at the time.