Mark 16:15-20New King James Version (NKJV)
15 And He said to them, “Go into all the world and preach the gospel to every creature. 16 He who believes and is baptized will be saved; but he who does not believe will be condemned. 17 And these signs will follow those who believe: In My name they will cast out demons; they will speak with new tongues; 18 they[a] will take up serpents; and if they drink anything deadly, it will by no means hurt them; they will lay hands on the sick, and they will recover.”
Christ Ascends to God’s Right Hand
19 So then, after the Lord had spoken to them, He was received up into heaven, and sat down at the right hand of God. 20 And they went out and preached everywhere, the Lord working with them and confirming the word through the accompanying signs. Amen.[b]
2 Corinthians 4:3-4New King James Version (NKJV)
3 But even if our gospel is veiled, it is veiled to those who are perishing, 4 whose minds the god of this age has blinded, who do not believe, lest the light of the gospel of the glory of Christ, who is the image of God, should shine on them.
1 Corinthians 14:2New King James Version (NKJV)
2 For he who speaks in a tongue does not speak to men but to God, for no one understands him; however, in the spirit he speaks mysteries.