Quote in the picture is from Clement of Alexandria, a Christian writer of the late 2nd century.

Only the Gospels of Matthew, Mark, Luke, and John have stood the test of time—cross‑culturally received and believed—and have carried the message of sacrifice foretold by the prophet Isaiah (see Isaiah 40:8; 42:1–12; 49:1–6; 52:13–15; and Isaiah 53). 

By contrast, the so‑called gnostic gospels fail to meet these prophetic standards. The difference is overwhelming—it’s not even close. 

Therefore, it is clear and easy to recognize which writings are the true Gospels.