Here's the full letter:
"Dear Jules,
"I'm not sure you'll remember me: I was your English teacher for your English 100 class at CSM in the spring of 2006. I've been wanting to write to you for, oh, what seems like a thousand years, to apologise to you for a flippant comment I made to you that semester.
"You may not even remember it, but I've felt bad about it for years. You had made some comment about 'going to the league', and I said something about setting realistic goals, about how few people successfully enter the ranks of the professional athlete, blah, blah, blah.
"I don't think it fazed you, frankly, but whenever I think back on it, I feel terrible, not because you proved me wrong, but because I stupidly voice an uneducated opinion that implied I had distain for your passion for the game.
"I think it was early in the semester, before I knew you, but how could I have ever doubted your tenacity and grit is beyond me! Again, I doubt you've ever even thought about it twice, but even so, I am sorry got wedging my foot so firmly in my mouth that day."
Edelman shared the post with the caption: "Set your goals high. Do whatever it takes to achieve them."