looks like a lovely time! I got it I do believe as it does have nothing to do with grammar but with math
Compound interest, who understands it earns it and who does not understand it pays it.

There is a high degree of reality, and life learning only in these thirteen words, how was there so much genius in your brain?

well it's more than 13 words it's about numbers not grammar as stated

Compound interest, who understands it earns it and who does not understand it pays it.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Fifteen words vs. said 13, I love things like this clearly ;) it's really sort of part of my job. Fun lil' brain teaser!

cheers,
axey