There's a tiredness of abstract inteligence, and it's the most horrible of tirednesses. It doesn't weight on you like the tiredness of the body, nor does it worry you like the tiredness of knowledge and emotion. It's a weightiness of the conscience of the world, an inability of the soul to breathe.
Fernando Pessoapg 9, "The consciousness of life's unconsciousness is the oldest tax levied on the intelligence.
Fernando PessoaTime, which grays hair and wrinkles faces, also withers violent affections, and much more quickly.
Fernando Pessoa