The possible ranks higher than the actual.

Teaching is more difficult than learning because what teaching calls for is this: to let learn. The real teacher, in fact, lets nothing else be learned than learning. His conduct, therefore, often produces the impression that we properly learn nothing from him, if by "learning" we now suddenly understand merely the procurement of useful information.

We should never allow our fears or the expectations of others to set the frontiers of our destiny.

To think Being itself explicitly requires disregarding Being to the extent that it is only grounded and interpreted in terms of beings and for beings as their ground, as in all metaphysics.

Understanding of being is itself a determination of being of Da-sein.

The mathematical is that evident aspect of things within which we are always already moving and according to which we experience them as things at all, and as such things. The mathematical is this fundamental position we take toward things by which we take up things as already given to us, and as they must and should be given. Therefore, the mathematical is the fundamental presupposition of the knowledge of things.

What is peddled about nowadays as philosophy, especially that of N.S. [National Socialism], but has nothing to do with the inner truth and greatness of that movement [namely the encounter between global technology and modern humanity] is nothing but fishing in that troubled sea of values and totalities.