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 PessoaThe idea of any social obligation ... just the idea of it embarasses my thoughts for a day, and sometimes it's since the day before that I worry, and don't sleep well, and the real affair, when it happens, is absolutely insignificant and justifies nothing; and the case repeats itself and I never learn to learn.
Fernando Pessoa