“Thinking is sometimes easy, often difficult but at the same time thrilling. But when it’s most important it’s just disagreeable, that is when it threatens to rob one of one’s pet notions & to leave one all bewildered & with a feeling of worthlessness. In these cases I & others shrink from thinking or can only get ourselves to think after a long sort of struggle.”

- Ludwig Wittgenstein, “Letter to Rush Rhees (17 October 1944)”