Where to begin, with the memories that he did have.

"When I first met Anakin, I was a student of the man who was killed. He told me shortly before that I was not ready to... graduate, for want of a better word. That man wanted to take Anakin as his student, because Anakin was... exceptionally gifted. At that point I was suddenly very ready. Then, as he was dying, he asked me to promise to teach Anakin. There should have been a transition between being a student and being a teacher. Instead, there was a formality and then it simply was."

In short, it was a lot.

And that is leaving out phropesies and Qui-Gon not wanting him to begin with.