"This day will the Lord deliver thee into mine hand and I will smite thee, and take thine head from thee and I will give the carcases of the host of the Philistines this day unto the fowls of the air, and to the wild beasts of the earth that all the earth may know that there is a God in Israel." (1 Samuel 17:46)
As a minister of the Gospel, you've been anointed by the Holy Spirit and you live the faith-life (Habakkuk 2:4). Therefore, to activate the anointing of God's Spirit that’s in you, for your walk of faith to be effective, you must learn to vocalise your faith.
Vocalising your faith means to make your boast in the Lord, affirming your faith in His ability, and how that ability is functioning in you! It means to acknowledge and declare your consciousness of His greatness in you.
Activate His power in you even now, by testifying of what He has done for you, and what the Word says He can do through you.