Philosophers, as things now stand, are all too fond of offering criticism from on high instead of studying and understanding things from within.

In a few decades of reconstruction, even the mathematical natural sciences, the ancient archetypes of theoretical perfection, have changed habit completely!

Merely fact-minded sciences make merely fact-minded people.

Experience by itself is not science.

Without troublesome work, no one can have any concrete, full idea of what pure mathematical research is like or of the profusion of insights that can be obtained from it.

To begin with, we put the proposition: pure phenomenology is the science of pure consciousness.

I must achieve internal consistency.