Yeah. I'm reminded of Schopenhauer's On Thinking for Oneself. Reading an email or Twitter forces others' thoughts upon the mind, but when a man stares at a bla

Yeah. I'm reminded of Schopenhauer's On Thinking for Oneself. Reading an email or Twitter forces others' thoughts upon the mind, but when a man stares at a blank wall and thinks for himself, he follows the impulse of his own mind. A blank wall does not, as reading a tweet does, impress a single definite thought upon the mind.