1 Peter 2:21

εἰς τοῦτο ἐκλήθητε. The call to follow Christ is not only to imitate Him in well-doing but also to share His sufferings, cf. 1 Peter 5:10; Matthew 16:24; 1 Thessalonians 3:3; 2 Timothy 2:11; Hebrews 2:10.

If the Captain of salvation was made perfect through suffering the same process is employed by God in bringing His other sons to glory.

ὑπολιμπάνων. λιμπάνειν is a late form for λείπειν, leaving behind.

ὑπογραμμός (in classical Greek ὑπογραφή), means a drawing to be traced over, or an outline to be filled in and coloured, cf. ὑποτύπωσις, a rough model, 1 Timothy 1:16; 2 Timothy 1:13. Neither ὑπολιμπάνειν nor ὑπογραμμός occur again.

ἐπακολουθεῖν, to follow close upon, like climbers treading in the steps of an Alpine guide. Cf. 1 Timothy 5:10; 1 Timothy 5:24; Mark 16:20.

ἴχνεσιν, cf. Romans 4:12; 2 Corinthians 12:18.