Those who are not happy internally can never be happy externally; those who are not happy within themselves can never make others happy. Those who do not love themselves can never love others.
If you really want to enjoy life and be happy, learn to practice and understand the philosophy of non-attachment.
The lord of life is love. Never get sad. Be happy and take care of your happiness. Jump in joy without worrying for the future. Why remain serious? Let you learn to jump in joy and smile all the time.
All human beings have inner potentials, but many people are not aware of those potentials and do not know how to use them to have a successful life. Those who are not happy internally can never be happy externally; those who are not happy within themselves can never make others happy. Those who do not love themselves can never love others.