A.T. Robertson Commentary Hebrews 6:12

"that ye be not sluggish, but imitators of them who through faith and patience inherit the promises." — Hebrews 6:12 (ASV)

That ye be not sluggish (ινα μη νωθρο γενησθε). Negative final clause with second aorist middle subjunctive of γινομα, "that ye become not sluggish (or dull of hearing)" as some already were (5:11).

Imitators (μιμητα). See 1 Thessalonians 1:6; 2:14 for this word (our "mimic" in good sense). The writer wishes to hold and develop these sluggards through those who inherit the promises (see 10:19-12:3), one of his great appeals later in ch. Hebrews 11 full of examples of "faith and long-suffering."