New Defender's Study Bible Notes
6:5 only evil continually. Universal wickedness requires a universal cause adequate to produce it. Nothing less than a worldwide influx of demonic control seems adequate to explain it.
6:6 his heart. The first mention of the word “heart” occurs here, connecting the evil in man’s heart with grief in God’s heart. This figure occurs often in Scripture, the “heart” representing the deepest seat of one’s emotions and decisions.