A. They had the witness of nature (Rom 1:19–20).
B. They had the witness of conscience (Rom 2:14–15).
C. They had the promise of a Redeemer (Gen 3:15).
D. They had the knowledge of the sacrifice (Gen 4:4).
E. They had the preaching of Enoch (Jude 1:14–15).
F. They had the preaching of Noah (2 Pet 2:5).
G. They had the ministry of the Holy Spirit (Gen 6:3).