we cannot think of any object apart from the possibility of its connexion with other things. - Ludwig Wittgenstein

If someone does not believe in fairies, he does not need to teach his children 'There are no fairies'; he can omit to teach them the word 'fairy'.

My day passes between logic, whistling, going for walks, and being depressed. I wish to God that I were more intelligent and everything would finally become clear to me - or else that I needn’t live much longer.

Everything that can be thought at all can be thought clearly. Everything that can be said can be said clearly.