For the price of intelligence as we now know it is chronic anxiety, anxiety which appears to increase—oddly enough—to the very degree that human life is subjected to intelligent organization.
Alan WattsIt seems to be the special peculiarity of human beings that they reflect: they think about thinking and know that they know. This, like other feedback systems, may lead to vicious circles and confusions if improperly managed, but self-awareness makes human experience resonant. It imparts that simultaneous "echo" to all that we think and feel as the box of a violin reverberates with the sound of the strings. It gives depth and volume to what would otherwise be shallow and flat.
Alan Watts