As in all things it all comes down to choice and how we choose to follow the laws of God. We can be like Nephi and know that the Lord gives us no commandment we can't keep, or we can be like the world that teaches that "if it feels good, do it". One leads to life eternal, the other to an eternal separation from the fullness of God's glory. We have to decide for ourselves which is most important to us... fleeting pleasure or a fullness of joy that will last forever.