* A rainbow is a sign to remind people that God promised not to flood the world again (see: Genesis 9:12-13).
* Circumcision was a sign of the covenant between God and Abraham. God promised to give Abraham and his descendants the Promised Land (see: Genesis 17:11-14).
* Signs can tell people that something is going to happen. They can tell people what they need to do. Signs can also tell people where they need to go.
* An angel told shepherds where to go by giving them a sign. This sign guided them to which baby in Bethlehem was the newborn Messiah (see: Luke 2:12).
* The Bible also talks about signs and wonders. These are miracles that God does or a person does by God’s power. These miracles prove that what God says is true (see: Acts 2:22; 15:12; 2 Corinthians 12:12; Hebrews 2:4).