The author of Hebrews presents three heroes of faith from the time before the Flood: Abel, Enoch, and Noah. Each of these three men demonstrated Biblical faith through their actions - Abel, through his sacrifice offered to God; Enoch, by walking with God for his whole life; and Noah by building an ark to save his family from the flood. It is clear through these historical accounts of Old Testament figures that God accepts only our faith for salvation and that trusting in God's promises is a sign of Biblical faith.