A.T. Robertson Commentary Revelation 3:4

"But thou hast a few names in Sardis that did not defile their garments: and they shall walk with me in white; for they are worthy." — Revelation 3:4 (ASV)

A few names (ολιγα ονοματα). This use of ονομα for persons is seen in the Koine (Deissmann, Bible Studies, p. 196f.) as in Ac 1:15; Revelation 11:13.

Did not defile (ουκ εμολυναν). First aorist active indicative of μολυνω (1 Corinthians 8:7; 1 Peter 1:4), pollution.

They shall walk (περιπατησουσιν). Future active of περιπατεω, promise of fellowship with Christ (μετ' εμου, with me) "in white" (εν λευκοις), as symbols of purity (7:9,13) like the angel (Matthew 28:3), with possibly a reference to Enoch (Genesis 5:22). For they are worthy (οτ αξιο εισιν). To walk with Christ, not worthy in the same sense as God and Christ (4:11; 5:9), but in a relative sense. See Re 16:6 for bad sense of αξιος.