Efesus 4:15

4:15 But practicing the truth in love, ¹  we will in all things grow up into Christ, who is the head.

Efesus 4:25

4:25 Therefore, having laid aside falsehood, each one of you speak the truth with his neighbor, ²  for we are members of one another.

Efesus 6:14

6:14 Stand firm therefore, by fastening ³  the belt of truth around your waist, ⁴  by putting on the breastplate of righteousness,

[4:15]  ¹ tn The meaning of the participle ἀληθεύοντες (alhqeuonte"; from the verb ἀληθεύω [alhqeuw]) is debated. In classical times the verb could mean “to speak the truth,” or “to be true, to prove true.” In the LXX it appears five times (Gen 20:16; 42:16; Prov 21:3; Isa 44:26; Sir 34:4) and translates four different Hebrew words; there it is an ethical term used of proving or being true, not with the idea of speaking the truth. In the NT the only other place the verb appears is in Gal 4:16 where it means “to speak the truth.” However, in Ephesians the concept of “being truthful” is the best sense of the word. In contrast to the preceding verse, where there are three prepositional phrases to denote falsehood and deceit, the present word speaks of being real or truthful in both conduct and speech. Their deceit was not only in their words but also in their conduct. In other words, the believers’ conduct should be transparent, revealing the real state of affairs, as opposed to hiding or suppressing the truth through cunning and deceit. See H. W. Hoehner, Ephesians, 564-65, and R. Bultmann, TDNT 1:251.

[4:25]  ² sn A quotation from Zech 8:16.

[6:14]  ³ sn The four participles fastening… putting on…fitting…taking up… indicate the means by which believers can take their stand against the devil and his schemes. The imperative take in v. 17 communicates another means by which to accomplish the standing, i.e., by the word of God.

[6:14]  ⁴ tn Grk “girding your waist with truth.” In this entire section the author is painting a metaphor for his readers based on the attire of a Roman soldier prepared for battle and its similarity to the Christian prepared to do battle against spiritually evil forces. Behind the expression “with truth” is probably the genitive idea “belt of truth.” Since this is an appositional genitive (i.e., belt which is truth), the author simply left unsaid the idea of the belt and mentioned only his real focus, namely, the truth. (The analogy would have been completely understandable to his 1st century readers.) The idea of the belt is supplied in the translation to clarify the sense in English.