Those who promise us paradise on earth never produced anything but a hell.
We have become makers of our fate when we have ceased to pose as its prophets.
Our knowledge can only be finite, while our ignorance must necessarily be infinite.
In so far as a scientific statement speaks about reality, it must be falsifiable; and in so far as it is not falsifiable, it does not speak about reality.
Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.