Noah Webster's 1828 Dictionary Definition of Truth:
Conformity to fact or reality; exact accordance with that which is, or has been, or shall be. The truth of history constitutes its whole value. We rely on the truth of the scriptural prophecies.
The days before the great flood were marked with violence and corruption (Gen 6:11-12). However, God chose a family and spared them because of the unmerited favor of God’s grace. God closed them into the ark so that they did not witness the destruction of the wicked. After the flood, God made His covenant. The rainbow is the sign of God’s covenant, not only with Noah, but also with all of humanity. He will never again destroy the earth by flood.
INSTRUCTIONS FOR CONSTRUCTION OF THE ARK
Gen 6:18 But I will establish my covenant with you, and you will enter the ark—you and your sons and your wife and your sons’ wives with you.
NOAH BUILDS AN ALTAR
2303 BC, 2349 BC (U)
Gen 9:9 “I now establish my covenant with you and with your descendants after you
Gen 9:10 and with every living creature that was with you—the birds, the livestock and all the wild animals, all those that came out of the ark with you—every living creature on earth.
Gen 9:11 I establish my covenant with you: Never again will all life be destroyed by the waters of a flood; never again will there be a flood to destroy the earth.”
Gen 9:12 And God said, “This is the sign of the covenant I am making between me and you and every living creature with you, a covenant for all generations to come:
Gen 9:13 I have set my rainbow in the clouds, and it will be the sign of the covenant between me and the earth.
Gen 9:14 Whenever I bring clouds over the earth and the rainbow appears in the clouds,
Gen 9:15 I will remember my covenant between me and you and all living creatures of every kind. Never again will the waters become a flood to destroy all life.
Gen 9:16 Whenever the rainbow appears in the clouds, I will see it and remember the everlasting covenant between God and all living creatures of every kind on the earth.”
Gen 9:17 So God said to Noah, “This is the sign of the covenant I have established between me and all life on the earth.”