The affection is mainly biological factor. Then further sort of strengthening, that religion helps.
Dalai LamaI believe compassion to be one of the few things we can practice that will bring immediate and long-term happiness to our lives.
Dalai LamaOn love, not harming others, and respecting all beings. Even animals have these elements in their behavioral patterns. We should start by observing how animals act. They are honest and appreciate it when we are honest with them. If you present something nice to an animal in one hand while hiding a rope in the other, the creature will know your intention. Yet animals have no religion, no constitution. Basic nature has endowed them with the faculty of discernment. It is the same for humans.
Dalai LamaAnger, hatred and jealousy never solve problems, only affection, concern and respect can do that.
Dalai LamaThe key to genuine happiness is in our hands. To think this way is to discover the essential values of kindness, brotherly love and altruism. The more clearly we see the benefits of these values, the more we will seek to reject anything that opposes them; in this way we will be able to bring about inner transformation.
Dalai Lama