The essential man is not a doer. The accidental man is a doer. The accidental man is, of course, then in anxiety, tension, stress, anguish, continuously sitting on a volcano. It can erupt any moment, because he lives in a world of uncertainty and believes as if it is certain. This creates tension in his be-ing: he knows deep down that nothing is certain.
–Osho, A Sudden Clash of Thunder, Chapter 3