Of course, maintenance of peace of mind, at the maximum extent possible, would be the greatest success in a human life.

Peace and happiness are like Left and Right hand of a human. Right hand is always seeking the harmonious support from Left hand. If either of the two is missing the person becomes a handicapped entity.

Needless to say that the consequence of the harmonious existence between humans is an ambience of peace and stability.

The measure of success is happiness and peace of mind.

If you are happened to be enjoying the basic necessities of life provided by God, you should be content with your life, and consequently, perpetual happiness would be the natural reward you receive against your self contentment.

Peace is letting it be. Letting life flow, letting emotions flow through you.