1. We cannot but speak that Jesus is the Christ. (Jer 20:9)
    Acts 4:18-20, 1 Cor 9:16

In the Old Testament, Jeremiah said that if he did not proclaim God, he would become frustrated and unable to bear it. (Jeremiah 20:9)

Jeremiah 20:9 Then I said, I will not make mention of him, nor speak any more in his name. But his word was in mine heart as a burning fire shut up in my bones, and I was weary with forbearing, and I could not stay.

We cannot but say that Jesus is the Christ. (Acts 4:12,18-20)

Acts 4:12 Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved.
18 And they called them, and commanded them not to speak at all nor teach in the name of Jesus.
19 But Peter and John answered and said unto them, Whether it be right in the sight of God to hearken unto you more than unto God, judge ye.
20 For we cannot but speak the things which we have seen and heard.

Woe to us if we do not proclaim that Jesus is the Christ. (1 Corinthians 9:16)

1 Corinthians 9:16 For though I preach the gospel, I have nothing to glory of: for necessity is laid upon me; yea, woe is unto me, if I preach not the gospel!