The more adept we become at cultivating an altruistic attitude, the happier we will feel and the more comfortable will be the atmosphere around us. But if our emotions fluctuate wildly and we easily give in to hatred and jealousy, even our friends will avoid us. So even for people with no spiritual beliefs, it is important to have a peaceful mind.
Dalai LamaSensory experience does not offset the intense pain or pleasure we feel on a mental level; it may distract us, but doesn't overcome it. On the other hand, if we have peace of mind, even negative experiences do not upset us. Peace of mind is also good for our physical health. Medical experts have found that anger, hatred and fear eat into our immune system. Being calm and relaxed is better for our physical well-being.
Dalai Lama