At some point in study of Bhagavad Gita or other wisdom books, you have to leave reasoning behind and take a different vehicle.
Even in science we do this to reach our destination. There are so many things that are unknown about light and electricity, yet we still use them in Science."
(A software engineer's contribution to a Gita discussion a couple weeks ago.)
The Gita teaches us that we suffer due to desire and anger. By analysis we learn to detach ourselves from these emotions, thus attaining our true, happy nature. Taking God's help makes this journey much easier. This book is so accommodating that even for those who have difficulty accepting a personal God, the Gita says, “OK, try it this way....”