From my Dearest Brother in Christ; who has on more than one occasion

4:15 ..spoken the truth in love,.(Eph 4:15) has shared other Truths we find in The Book of Proverbs 

Better is a poor man who walks in his integrity than a man who is perverse in speech, and is a fool. and while perhaps not directly from scripture; I've been told "...better to keep  silent and to be thought a fool than to open one's mouth and remove all doubt!"