An investment in knowledge pays the best interest.
In plain words
Anything you learn keeps paying you back forever.
Where these words come from
- 37% sureLots of sources credit Benjamin Franklin with this, and they agree with each other. The book or the speech it first came from hasn't turned up yet.
- widely attributed, no primary source found — absent from Franklin's Wikiquote page entirely, and Bartleby's reference catalog marks it "unverified"
