In truth, sin only brings fleeting pleasure. Like an addiction, we might try to sin more and more to try and regain that pleasure over and over. Initially, guilt accompanies sinful behavior. If we insist on continuing the sinful behavior we have to learn to either harden ourselves against the guilt or constantly feel the burden of guilt. Over time, even the temporary pleasure of sin fades, yet we may continue the sin simply because it has become part of our character.
Sin never fully satisfies. It never brings lasting happiness. It never leaves us with a feeling of contentment. When Heavenly Father gives us commandments and instructions, they are not meant as restrictions to keep us from enjoying ourselves. In fact they keep us from such misery. Commandments and instructions from God are priceless because they are really guidelines on how to achieve lasting happiness.
God has achieved lasting joy, consistent contentment, constant happiness. As a loving Father, He is trying to help us find the same in our own lives. He will not force it on us--real happiness can never be forced--but He will encourage and inspire, teach and persuade.
Am I always happy? Do I live in constant joy? If I am willing, God will show me how to change so that I may be more and more content and happy. He will never quit helping me until I reach the state of perfect joy that He has attained. His guidelines may not always be easy, but they will always be easier than living in sin, and they will always lead to greater life enjoyment.