3. It is good to be happy, and it is good for a person to try to be happy. People should always try to improve their lives and be happy in the long term, so that they are happy now and in the future. People should not hurt others to try to be happy, but they also should not hurt themselves to try to make other people happy. People should also not make themselves less happy to help something like God. Ayn Rand called this "rational self-interest".