Baptism & Temptation: Luke 3:21-4:13

The baptism of Jesus was a key moment in Jesus' ministry. But why did the Holy Spirit appear as a dove? Did a voice really speak from heaven? Who is Eli in the genealogy of Jesus? When Jesus was tempted, why would it be wrong for him to turn stones into bread? Where was the pinnacle of the Temple where Satan took him? Why would it be wrong for Jesus to cast himself down from there?