The point is not to completely understand God but to worship Him. Let the very fact that you cannot know Him fully lead you to praise Him for His infiniteness and grandeur.
When I am consumed by my problems-stressed out about my life, my family, and my job-I actually convey the belief that I think the circumstances are more important than God’s command to always rejoice.
The fact is, I need God to help me love God. And if I need His help to love Him, a perfect being, I definitely need His help to love other, fault-filled humans.