My take, in general, on this thread is that our future orientation is a blessing and a curse. A blessing in terms of seeing the seeds of greatness in other people and ideas -- what we can aspire to and so forth, how ideas can change the world. But on the flip side (and I heard this exact phrase from another INFJ) we can be burdened with a sense of Doom when fear and insecurities are present.
Burden is a good word, too. The first time someone noticed it in me was the General Manager in my first job. Long story about the mismatched job/personality, but basically I was in my supervisor's office crying over something. The GM, who never seemed to have a care in the world, not a hair out of place, and someone we called "Shiney Shoes" behind his back, asked me, "What is your burden??" I stared at him. I had no idea I even had a burden.
Years later, I read the INFJ description by Otto Kroeger in "Type Talk." He says, in part, "They would do better to work out tensions within themselves than to focus on external conflicts, because they often carry very heavy inner burdens." I was shocked ... someone understood. This might be particular to INFJs, though ENFJ's seem to carry heavy burdens as well.
re: late bloomerism and perfectionism ... I have never voluntarily brought a skill out into public until I was sure I'd mastered it in private (a conundrum in dating, for sure!). To the extent that I could avoid team sports and competition, I did. Maybe that's just introversion, not so much NF's per se. But NF's are definitely idealists, and we can expect perfectionism in ourselves.
I was in a happy place working for an ENFJ boss once (in the ministry) but was badly hurt in the end (his daughter ended up replacing me). NF's can see potential that no one else can, so he helped me in that way ... but IF and when that potential doesn't materialize up to the NF's expectations, it is a big fall from grace. The person who lifted my spirits the most when that happened was an ESTJ .... God bless the practical SJ's

To this day I mistrust spiritual authority and take other NF's with serious doses of salt when they flatter me. But SJ's - I take it to the bank!
Sorry, I'm not sure how I got off topic but - there it is ... a waNdering thread.