Contradiction with Matthew 5:16
Ephesians 6:21 speaks of making known affairs, while Matthew 5:16 encourages letting one's light shine to benefit others, suggesting transparency rather than secrecy.
Matthew 5:16: Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven.
Contradiction with Matthew 6:3
Ephesians 6:21 involves communication of personal affairs, whereas Matthew 6:3 warns against letting your actions be known, implying discretion.
Matthew 6:3: But when thou doest alms, let not thy left hand know what thy right hand doeth:
Contradiction with Proverbs 11:13
Ephesians 6:21 talks about revealing details, while Proverbs 11:13 values keeping confidential matters hidden.
Proverbs 11:13: A talebearer revealeth secrets: but he that is of a faithful spirit concealeth the matter. [A talebearer: Heb. He that walketh, being a talebearer]
Contradiction with Proverbs 17:9
Ephesians 6:21 involves sharing information, yet Proverbs 17:9 advises covering a matter for seeking love, implying restraint in sharing.
Proverbs 17:9: He that covereth a transgression seeketh love; but he that repeateth a matter separateth [very] friends. [seeketh: or, procureth]