Themes
Young in limbs, in judgement old.
— William Shakespeare ‧ The Merchant of Venice

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Praise for someone whose body is young yet whose thinking is mature. The line sets youth of limb against age of judgement, suggesting wisdom that has arrived early. It admires a mind older than the person's years, and the balanced phrasing folds a compliment around a contrast.
Context reviewed