The cockroach and the bird were both here long before we were. Both could.

Every time a value is born, existence takes on a new meaning; every time one dies, some part of that meaning passes away.

Man is the only one in whom the instinct of life falters long enough to enable it to ask the question "Why?

In our hearts those of us who know anything worth knowing know that in March a new year begins, and if we plan any new leaves, it will be when the rest of Nature is planning them too.

The most serious charge which can be brought against New England is not Puritanism, but February.... Spring is too far away to comfort even by anticipation, and winter long ago lost the charm of novelty. This is the very three a.m. of the calendar.

The famous balance of nature is the most extraordinary of all cybernetic systems. Left to itself, it is always self-regulated.

It is not ignorance but knowledge which is the mother of wonder.