The first thing I want us to do, is to come into reality.
Evil really exists here on earth.

Revelation 12:7 And there was war in heaven: Michael and his angels
fought against the dragon; and the dragon fought and his angels,
12:8 And prevailed not; neither was their place found any more in heaven.
12:9 And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.

The second thing is, understand we are at war with an unseen enemy (Spiritual War.)

Ephesians 6:12 For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.

The next thing is, we need to be properly dressed for this battle

6:13 Wherefore take unto you the whole armour of God, that ye may be able to withstand in the evil day, and having done all, to stand.
6:14 Stand therefore, having your loins girt about with truth, and having on the breastplate of righteousness;
6:15 And your feet shod with the preparation of the gospel of peace;
6:16 Above all, taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked.
6:17 And take the helmet of salvation, and the sword of the Spirit, which is the word of God:

How to stay on guard?

6:18 Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints;