“Keep close to Nature's heart... and break clear away, once in awhile, and climb a mountain or spend a week in the woods. Wash your spirit clean.”

“Everybody needs beauty as well as bread, places to play in and pray in, where nature may heal and give strength to body and soul.”

“I never saw a discontented tree. They grip the ground as though they liked it, and though fast rooted they travel about as far as we do.”

“Take a course in good water and air; and in the eternal youth of Nature you may renew your own. Go quietly, alone; no harm will befall you.”

“Climb the mountains and get their good tidings.”

“There is that in the glance of a flower which may at times control the greatest of creation's braggart lords.”

“When one tugs at a single thing in nature, he finds it attached to the rest of the world.”

“The clearest way into the Universe is through a forest wilderness.”

“The mountains are calling and I must go.”

“We are now in the mountains and they are in us, kindling enthusiasm, making every nerve quiver, filling every pore and cell of us.”