A.T. Robertson Commentary Colossians 3:7

"wherein ye also once walked, when ye lived in these things;" — Colossians 3:7 (ASV)

Walked aforetime (περιεπατησατε ποτε). First aorist (constative) indicative referring to their previous pagan state.

When ye lived (οτε εζητε). Imperfect active indicative of ζαω, to live, "ye used to live" (customary action). Sharp distinction in the tenses.