By faith Noah, being warned of God of things not seen as yet, moved with fear, prepared an ark to the saving of his house; by the which he condemned the world, and became heir of the righteousness which is by faith. (Hebrews 11:7)
"Being warned of God"
1/ Those for whom the danger was real and the action they were moved to take. Scriptural examples .
2/ Man's danger in a state of Nature .
3/ The danger of various things to a Christian .