I give no sources, because it is indifferent to me whether what I have thought has already been thought before me by another.
Ludwig WittgensteinIf there were a verb meaning "to believe falsely," it would not have any significant first person, present indicative.
Ludwig WittgensteinA tautology's truth is certain, a proposition's possible, a contradiction's impossible.
Ludwig WittgensteinLike everything metaphysical the harmony between thought and reality is to be found in the grammar of the language.
Ludwig Wittgenstein