A.T. Robertson Commentary 1 Corinthians 1:22

"Seeing that Jews ask for signs, and Greeks seek after wisdom:" — 1 Corinthians 1:22 (ASV)

Seeing that (επειδη). Resumes from verse 21. The structure is not clear, but probably verses 23,24 form a sort of conclusion or apodosis to verse 22 the protasis. The resumptive, almost inferential, use of δε like αλλα in the apodosis is not unusual.

Ask for signs (σημεια αιτουσιν). The Jews often came to Jesus asking for signs (Matthew 12:38; Matthew 16:1; John 6:30).

Seek after wisdom (σοφιαν ζητουσιν). "The Jews claimed to possess the truth: the Greeks were seekers, speculators" (Vincent) as in Ac 17:23.