The only real voyage of discovery consists not in seeking new landscapes, but in having new eyes.

The stream of thought is a stream of survival.

The central task of education is to implant a will and facility for learning; it should produce not learned but learning people. The truly human society is a learning society, where grandparents, parents, and children are students together.

Every dollar invested in responsible forestry today grows into a hundred dollars of environmental and economic value tomorrow.

释义：广泛地学习，恳切地提问，从而增长知识；行为高尚，言语谨慎，从而修养自身。这是对学习与修养的重视。