Ultimately, the reason why love and compassion brings us the greatest happiness is simply that our nature cherishes them above all else. The need for love lies at the very foundation of human existence. However capable and skillful and individual may be, left alone he or she will not survive. We need a genuine sense of responsibility and a sincere concern for the welfare of others.
The expression of love is also very important at the time of birth. No one is born free of the need for love.