1) We need savior to defeat a vicious enemy.
Israel needed someone to save them from Nahash the Ammonite (1 Sam. 11:1-4). We need someone to save us from the Devil (1 Peter 5:8; John 8:31-34; Revelation 12:17; Acts 4:26-27).
2) Only the Lord's anointed can save us from the enemy.
King Saul was God's anointed, and through him God secured a great victory for Israel (1 Sam. 11:5-11, 13b).
Jesus is the Lord's anointed, and through Him we have victory over the Devil (Matthew 1:21; Luke 4:18; John 12:27-33; Colossians 2:15; 1 Corinthians 15:56-57).
3) The saving work of the anointed should lead us to serve him more.
In the case of Saul, the people renewed their commitment to follow his leadership (1 Sam. 11:12-15).
We should be even more ready to serve our Anointed One who has delivered us (Luke 1:68-75).