(Because) the notion of absolute truth is difficult to sustain outside the context of religion, ethical conduct is not something we engage in because it is somehow right in itself but because, like ourselves, all others desire to be happy and to avoid suffering. Given that this is a natural disposition, shared by all, it follows that each individual has a right to pursue this goal. Accordingly, I suggest that one of the things which determines whether an act is ethical or not is its effect on others' experience or expectation of happiness.
Dalai LamaFoolish, selfish people are always thinking of themselves and the result is always negative. Wise persons think of others, helping them as much as they can, and the result is happiness. Love and compassion are beneficial both for you and others. Through your kindness to others, your mind and heart will open to peace.
Dalai LamaThe 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 Lama