I go to nature to be soothed and healed, and to have my senses put in order.

The atmosphere of our time is fast being cleared of the fumes and deadly gases that arose during the carboniferous age of theology.

One can only learn his powers of action by action, and his powers of thought by thinking

The floating vapour is just as true an illustration of the law of gravity as the falling avalanche.

The spirit of man can endure only so much and when it is broken only a miracle can mend it.

The deeper our insight into the methods of nature . . . the more incredible the popular Christianity seems to us.

Now is the time of the illuminated woods ... when every leaf glows like a tiny lamp.