Young man, in mathematics you don't understand things. You just get used to them.I know people here have quoted this before (I think Vlorbik might have been the person who I first heard this from). But I just stumbled across it today and had to quote it again.
Reply to Felix T. Smith who had said "I'm afraid I don't understand the method of characteristics."
—as quoted in The Dancing Wu Li Masters: An Overview of the New Physics (1984) by Gary Zukav footnote in page 208.
John von Neumann
For what it's worth, this observation describes my own experience of learning math - quite a bit of it, at any rate.