Every man needs a vision in everything he does, both in his personal life and in his occupation. Without a vision, he does not really know what he is doing or why; therefore, his life does not prosper. Thus, he lives according to only his basic needs. 
It is the same with spiritual life. Without a proper vision, we do not know what way to take in regard to God’s will and our cooperation with Him. For this reason, the children of God often have difficulty advancing in their Christian journey or go on without much impact. 
The content of this book is very helpful regarding the vision which should govern us and our commission. 
Read it and find out!