The Ramchal discusses the concept of יראת רוממותו, the fear of Hashem's exaltedness. He explains that generally it is not too difficult to pinpoint the distance between two points. For example, we know how far it is from Jerusalem to Eilat. We can determine how long it will take to get there if we drive there.
However, when it comes to knowing the distance between ourselves and Hashem, we know that point one is the place we are standing. The point where we reach Hashem is not able to ascertain. It cannot be measured in any form at all. We know that Hashem's Presence is very very high.
The Ramchal felt that if we put things according to this perspective, we will have an idea of יראת רוממותו and we will know our place in relation to G-d.