Vinjashira has correctly guessed the quote. It was -

"When I was a boy of fourteen my father was so ignorant that I could hardly stand to have the old man around. But when I got to be twenty one, I was astonished at how much he had learned in seven years.

Mark Twain"

vinjashira N(15) = 15
Randi E(17)+O(14) = 62
mina’smomma A(19)+H(12) = 50
Amberlee I(8) = 16
Miss Z S(9) = 9

Vinjashira hosted a puzzle very recently and asked asked if Randi, as the highest scorer, would like to do the next one. Hope you have a good quote to hand, Randi!