In our worship to God many times we utter phrases like "God I magnify you" or "God be magnified". I used to wonder, is God really magnified by saying those words? How can we really magnify God or have him magnified?
Clearly, those phrases can't mean that we have the ability to alter God in any way. I don't think that the definition of "magnify God" in these phrases means to actually make God "bigger" or "greater". I understand them to mean "Make God more prominent in my life, our culture, etc."
Magnification doesn't make objects bigger, it alters our perception of an object, making it appear bigger to us.
Similarly, magnifying God doesn't make Him bigger, it means He becomes more prominent to us.
The phrase "God, I magnify you" simply means "I am making you greater (more important) in my life, and putting you first, because you are my focus and priority."