There are various processes of life, which God has ordained into life. Both of the good and of the evil, and man makes his choices. A person makes choices out of the condition of their heart, what their heart’s desire is. And also, a person makes decisions based on knowledge and understanding of spiritual things. This is where the study of the word of God comes into play. If a person wants to be able to understand the decisions they make, they must understand the word of God. So that they can use that understanding given to them by God's Spirit to make decisions in life.