"The world is a mystery, and we are here to unravel it."

"The true path to knowledge is to question everything."

"The problem of the 'thing in itself' is not a problem that can be solved by science. It is a philosophical problem."

"The great difficulty for our contemporary way of thinking is that we must recognize the identity of the experiencing and the experienced subject."

"The world is not to be understood by reason alone. It is also to be understood by intuition and feeling."