Who - (Compare Psa 34:12, Psa 34:13). All wish to appear “wise”: few are so.
show - “by works,” and not merely by profession, referring to Jam 2:18.
out of a good conversation his works - by general “good conduct” manifested in particular “works.” “Wisdom” and “knowledge,” without these being “shown,” are as dead as faith would be without works [Alford].
with meekness of wisdom - with the meekness inseparable from true “wisdom.”