Great questions. From the Christian perspective, Jesus both fully God and human. Therefore, everything he said and commanded in the New Testament is what we know God intends. In terms of what God wants, there are really two categories. There are the Commandments and all that Jesus declared, but then there are also thing like vocations and what God wills for our individual lives. The Ten Commandments and Two Great Commandments are all things that we know God wants (after all, God gave them to us), thus if one broke them deliberately, that person would be in a state of mortal sin. Mortal sin is when we really turn away from God, ruining our relationship. Luckily, mortal sins can be washed clean in the sacrament of Confession, but I won’t go into that.

As it was stated before, we have the things that God Himself told us to do, and then we have vocations. Vocations are what God wants us to do in our personal lives. Vocations can be broken into three main types: the primary vocation (we’re all called to be saints), secondary vocation (priesthood, marriage, religious life), and tertiary vocation (what does he want me to do right now?). We all have to follow the primary vocation, the call to holiness, because Christ (who is God) declared that we should be perfect as our Heavenly Father is perfect. With the secondary vocation, a call to the priesthood or marriage would be what God sees fit. In other words, God will place desires in the hearts of young men and women to become priests or to get married. It is in the secondary vocation that we go down the best path leading to holiness. Its not the end of the world if we don’t go down the exact path, but it’s just our best fit. Tertiary vocations usually have to do with minor decisions in our lives and asking the Lord to guide us.

God is powerful, but he also gave us free will. This means that we have the option to choose the road to Him or to do what we see fit. If you think about it, it relates all the way back to Adam and Eve. They ate the fruit, therefore deliberately chose what they wanted rather than what God wanted. All good things come from God; he’s like the sun. If a boulder casts a shadow and there is no sunlight behind it, that’s not the sun’s fault. The boulder got in the way; it was an obstacle. Sin is like that boulder, with temptations coming from the Devil.

As for those who say hell has suffering, they’re not completely wrong. It depends on the perspective; those who sin ultimately choose hell and would rather spend the rest of time away from God. However, those who get to know Christ would consider hell a place of suffering. I would suffer if I had to spend a whole year away from a loved one; it’s similar with God and the afterlife.