Flint is a very hard variety of quartz that was plentiful in the land of the Bible. It could be broken into sharp pieces and used to make tools and weapons. Knives, arrowheads, sickle blades, and saws were all made from flint. The Bible often uses flint as a picture of strength and determination (Isa. 50:7; Ezek. 3:9). In Psalm 114, it provides a picture of God’s power over what he has created.