The author of Hebrews implies that God did not speak through Jesus during the Old Testament period, which contradicts the belief that Jesus appeared to the Old Testament prophets.

The text of Hebrews states that God spoke to our forefathers through the prophets at many times and in various ways, but in these last days, He has spoken through His Son. This indicates that Jesus was indeed active throughout history, even before His incarnation. The author emphasizes that God used different means to communicate with His people, including His Son and the Spirit. The writer of Hebrews cites Old Testament passages to demonstrate that it was Jesus who spoke in those instances, affirming His presence and role in the Old Testament. Therefore, the argument is not that God did not speak through Jesus at all during the Old Testament, but rather that His speaking was part of a broader communication strategy that included various other means.