2 Corinthians 12:12
The signs of a true apostle were performed among you in all perseverance, with signs and wonders and mighty works.
John 4:48
Jesus said to him, "Unless you people see signs and wonders, you will never believe."
Romans 15:18-19
For I will not venture to speak of anything except what Christ has accomplished through me to win obedience from the Gentiles, by word and deed
1 Corinthians 1:5-7
that in every way you were enriched in him in all speech and all knowledge
1 Corinthians 9:1-2
Am I not free? Am I not an apostle? Have I not seen Jesus our Lord? Are you not my work in the Lord?
1 Corinthians 14:18
I thank God that I speak in tongues more than you all;
2 Corinthians 4:2
But we have renounced secret and shameful ways; we do not use deception, nor do we distort the word of God. On the contrary, by setting forth the truth plainly we commend ourselves to every man's conscience in the sight of God.
2 Corinthians 6:4-10
But as servants of God we commend ourselves in every way: through great endurance, in afflictions, hardships, distresses,
2 Corinthians 11:4
For if someone comes to you and preaches a Jesus other than the one we preached, or if you receive a different spirit from the one you received, or a different gospel from the one you accepted, you put up with it easily enough.
2 Corinthians 11:6
But even if I am unskilled in speech, I am not in knowledge; in every way we have made this plain to you in all things.