Duke University did a study on “peace of mind.” Factors found to contribute greatly to emotional and mental stability are:
1. The absence of suspicion and resentment. Nursing a grudge was a major factor in unhappiness.
2. Not living in the past. An unwholesome preoccupation with old mistakes and failures leads to depression.
3. Not wasting time and energy fighting conditions you cannot change. Cooperate with life, instead of trying to run away from it.