And when they prevailed over them, the Hagrites and all who were with them were given into their hands, for they cried out to God in the battle, and he granted their urgent plea because they trusted in him. 1 Chronicles 5:20 (ESV)
These men were mighty and valiant men, this was not only true physically but spiritually as well. They put their faith and trust in God and cried out to God in the middle of the battle, God heard and graciously granted their request. We must learn from this to be valiant in our spirits and minds.
We must put our trust and faith in God. We must open our mouths in the middle of the battle and cry out to God. see John 14:1, 1 Thessalonians 5:17 and Ephesians 6:10–18
Now the Spirit expressly says that in later times some will depart from the faith by devoting themselves to deceitful spirits and teachings of demons, 1 Timothy 4:1 (ESV)
We must still be aware of this today, ever since Jesus came the last days have been in motion and we have seen the teachings of demons in blatant areas in institutions like the Roman Catholic church with its “Veneration” of Mary or the Watchtower Society who say Jesus is just an Angel to modern day distortions and inversions of the truth in things like the New Age and the Word of Faith Movement.
These false teaching often rely on legalistic frameworks to keep its adherents in bondage which is why they in some cases insist on celibacy and in others an over emphasis on spiritual exercises like fasting or even being away from normal life and people (monks etc).
We should avoid these sort error and extremism.
For everything created by God is good, and nothing is to be rejected if it is received with thanksgiving, 1 Timothy 4:4 (ESV)
God’s created order with things like marriage and food should bring us great pleasure and bring God great glory as we enjoy these things in thanksgiving and honour to him.
Our faith is not just spiritual it has a very real part to play and affect on the physical world which does not belong to the devil and was created by God. We should avoid all suable forms of Gnosticism which says the spiritual is good and the physical is evil, the bible does not teach that, the physical and spiritual all belong to and were created by God.
We will not hide them from their children, but tell to the coming generation the glorious deeds of the LORD, and his might, and the wonders that he has done. Psalm 78:4 (ESV)
We must preserve and spread our faith by teaching it to our Children so that they too will know God in their generation.