The pleasure or the benefit that the object of our deed derives from it is every now and then greater or even more important than the one we derive from the deed.

Nothing holds back human progress as frequently as the misbelief that the words ‘impossible’ and ‘improbable’ are synonyms.

Because of human pollution and overpopulation, the birth of a human being, like the death of a tree, is, to planet earth, a tragedy.

Humans are the most important entity in the universe … only to most people.

Human beings are important only to the survival of the human race.