We judge ourselves by what we feel capable of doing, while others judge us by what we have already done.
Source: Kavanagh, bk. 1, ch. 1, 1849.
-- Henry Wadsworth Longfellow, (Feb 27 1807-1882), US poet, educator; He was the most popular 19th century poet, e.g., Village Blacksmith, 1842, and 1st American with a bust in Westminster Abbey.