In the song "Small Town Southern Man," Alan Jackson writes and sings that his protagonist understands that his "... greatest contribution is the ones you leave behind."
Our legacy IS, in fact, those we leave behind, in the form of children and/or mentees.
Some important questions beg answering:
What have we taught them intentionally?
What have we taught them unintentionally?
What will we yet teach them with the time we have remaining?
Whatever those lessons (past, present, and future), they will most assuredly keep being shared for subsequent generations.
Teach intentionally, teach rightly, teach well...