A few quotes from Johann von Neumann

In mathematics you don't understand things. You just get used to them.

The sciences do not try to explain, they hardly even try to interpret, they mainly make models. By a model is meant a mathematical construct which, with the addition of certain verbal interpretations, describes observed phenomena. The justification of such a mathematical construct is solely and precisely that it is expected to work.

You wake me up early in the morning to tell me I am right? Please wait until I am wrong.