p98 If we did not have delusions we would experience only peace and contentment.

If we did not have delusions we would experience only peace and contentment. When our delusions are not functioning strongly our mind is relatively tranquil and contented, but as soon as anger, jealousy or desirous attachment arise they destroy our peace of mind like a sudden storm destroying the tranquillity of an ocean. Even if we are in good physical health, when delusions manifest our mind becomes ill at ease.

Venerable Geshe Kelsang Gyatso Rinpoche,
How to understand the mind