Natural objects, for example, must be experienced before any theorizing about them can occur.

I must achieve internal consistency.

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.

It just is nothing foreign to consciousness at all that could present itself to consciousness through the mediation of phenomena different from the liking itself; to like is intrinsically to be conscious.

All consciousness is consciousness of something

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

Experience by itself is not science.