... freedom is a conquest, always partial, always precarious, always challenged. ... the freest person is the one with the most hope.

A mystery is a problem that encroaches upon itself because the questioner becomes the object of the question. Getting to Mars is a problem. Falling in love is a mystery.

Contemplation and wisdom are highest achievements and man is not totally at home with them.

But a science is exact to the extent that its method measures up to and is adequate to its object.

The dynamic element in my philosophy, taken as a whole, can be seen as an obstinate and untiring battle against the spirit of abstraction.

On a grassroots level we say that man can touch more than he can grasp.

Contemporary thinkers would say that man is continuously transcending himself.