Some think that being able to do whatever their heart desires is happiness. That is a misconception that is guaranteed to bring sorrow in the future. The real key to happiness is not so much in doing what you like, but it in liking what you do. Liking what we do brings results that are measureable by the response we have from others and by the respect we develop for ourselves.
That which we want to do is not always wise or what others consider to be normal. Some like to gamble, some like to drink, some smoke. Those may be things people like to do, but it often hurts others as well as the self. Liking what we allow ourselves to do involves the feelings of our family and friends. It moves us from selfishness to selflessness. Leave serving the self alone and do that which serves others, and you will be serving yourself. Paul's knew this (Romans 7:23-25 Romans 7:23-25  But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members.
 O wretched man that I am! who shall deliver me from the body of this death?
 I thank God through Jesus Christ our Lord. So then with the mind I myself serve the law of God; but with the flesh the law of sin.
American King James Version×). He learned that with God's Word to guide and help, we can become new.