Keep the commandments of God. If you have sinned, the sooner you begin to make your way back, the sooner you will find the sweet peace and joy that come with the miracle of forgiveness. Happiness comes from living the way the Lord wants you to live and from service to God and others.
Things in which we do not take joy are either a burden upon our minds to be got rid of at any cost; or they are useful, and therefore in temporary and partial relation to us, becoming burdensome when their utility is lost; or they are like wandering vagabonds, loitering for a moment on the outskirts of our recognition, and then passing on. A thing is only completely our own when it is a thing of joy to us.
When firmly planted, your testimony of the gospel, of the Savior, and of our Heavenly Father will influence all that you do throughout your life. It will help to determine how you spend your time and with whom you choose to associate. It will affect the way you treat your family, how you interact with others. It will bring love, peace, and joy into your life.
When doubts haunt me, when disappointments stare me in the face, and I see not one ray of hope on the horizon, I turn to Bhagavad-gita and find a verse to comfort me; and I immediately begin to smile in the midst of overwhelming sorrow. Those who meditate on the Gita will derive fresh joy and new meanings from it every day.
Joy and growth come from following our deepest impulses, however foolish they may seem to some, or dangerous, and even though the apparent outcome may be defeat.
Did my infancy succeed another age of mine that dies before it? Was it that which I spent within my mother's womb?... And what before that life again, O God of my joy, was I anywhere or in any body?
In the actual world--the painful kingdom of time and place--dwell care, and canker, and fear. With thought, with the ideal, is immortal hilarity, the rose of joy.