“When reason has followed its road to the end, the point of crisis is reached and man is brought to the great question mark over his own existence.”

“The important thing is not to stop questioning. Curiosity has its own reason for existing.”

“Most men are reasonably useful in a crisis. The difficulty lies in convincing them that the situation has reached a critical point”

“Through our failure to acknowledge our oneness with the total of other population s of biological organisms...we reveal the egocentricity which has brought the world to the point of [environmental] crisis... the separation of man from his ecosystems ... has become an article of faith.”

“The actual life of a thought lasts only until it reaches the point of speech...As soon as our thinking has found words it ceases to be sincere...When it begins to exist in others it ceases to live in us, just as the child severs itself from its mother when it enters into its own existence.”

“When man has reached the periphery of the spiderweb of his own reason and logic, he can find the ropes of revelation upon which he can climb upward forever and ever.”