We still must know our future as a child. The Bible is not just that book, but it shows us prophecy. The Bible told us what our future will be. He already knows what will happen in the future.
When we follow the Bible, we are getting more insights. Every Christian should follow the Bible. They must know what is written in the Bible. The Bible is the truth that constructs everything in the future. We must believe and live our lives according to what is being said in the Bible. What will be, will be.
It's not that God has declared anything about our lives. The future of our life has already been programmed. We are just to live it out. God has already ordained us. When we listen to the will of God, we follow his path, then we are now given the faith to be part of the will of God.