2 Corinthians 12:12
The signs of an apostle were performed among you with utmost patience signs, wonders, and powerful actions.
John 4:48
Jesus told him, "Unless you people see signs and wonders, you will never believe."
Romans 15:18-19
For I am bold enough to tell you only about what the Messiah has accomplished through me in bringing gentiles to obedience. By my words and actions,
1 Corinthians 1:5-7
For by him you have become rich in every way in speech and knowledge of every kind
1 Corinthians 9:1-2
I am free, am I not? I am an apostle, am I not? I have seen Jesus our Lord, haven't I? You are the result of my work in the Lord, aren't you?
1 Corinthians 14:18
I thank God that I speak in foreign languages more than all of you.
2 Corinthians 4:2
Instead, we have renounced secret and shameful ways. We do not use trickery or pervert God's word. By clear statements of the truth we commend ourselves to everyone's conscience before God.
2 Corinthians 6:4-10
Instead, in every way we demonstrate that we are God's servants by tremendous endurance in the midst of difficulties, hardships, and calamities;
2 Corinthians 11:4
For if someone comes along and preaches another Jesus than the one we preached, or should you receive a different spirit from the one you received or a different gospel from the one you accepted, you are all too willing to listen.
2 Corinthians 11:6
Even though I may be untrained as an orator, I am not so in the field of knowledge. We have made this clear to all of you in every possible way.