How do we fight and defeat the enemies of the Church, sin and evil wicked men?
God's standard has to be raised at all times for all men.
Christians must start with obedience to the first commandment of God. This is God's standard:
"And thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength: this [is] the first commandment."
Meditate on this verse. Our complete being is to be 100% committed to loving God. If we love God truly we will dedicate our life to obeying all His commandments. Then we can fight and defeat our enemies with the power and authority of the word of God.