The wise man knows how to run his life so that contemplation is possible.

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

... 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.

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

Metaphysics is a science.

But however measurable, there is much more life in music than mathematics or logic ever dreamed of.