Why did Hagar not see the well of water and what can we learn from this?

Answer From The Annual Reading Schedule - Week 5 Notes For Genesis: In Genesis 21:19 we learn that Hagar's eyes were opened to see a well of water. She did not see this because her eyes had not been opened. This is similar to Numbers 22:31 and 2 Kings 6:17-20. What we can learn from this is that there are things around us we just can't see going on or existing unless and until Yahweh opens our eyes. Just as Psalms 34:7 says His messenger are around us who fear Him, yet do we see them all the time? No; but they are here. Remember that Yahweh is called "the invisible Elohiym" (Colossians 1:15, 1 Timothy 6:16, Hebrews 11:27). Just because we can't see Him doesn't mean He is not with us. There are many things that right now we simply cannot see unless our eyes were opened.