'Gospel' in the Bible

Now [when I] arrived in Troas for the gospel of Christ and a door was opened for me by the Lord,

But if indeed our gospel is veiled, it is veiled among those who are perishing,

among whom the god of this age has blinded the minds of the unbelievers, so that they would not see the light of the gospel of the glory of Christ, who is the image of God.

And we have sent at the same time with him the brother whose praise in the gospel [has become known] throughout all the churches.

Through the proven character of this service [they will] glorify God because of the submission of your confession to the gospel of Christ and the generosity of [your] participation toward them and toward everyone,

For we are not overextending ourselves, as [if we] had not reached you, because we have reached even as far as you with the gospel of Christ,

so that we may proclaim the gospel in the regions that lie beyond you, [and] not boast in the things accomplished in the [area] assigned to someone else.

For if the one who comes proclaims another Jesus whom we have not proclaimed, or you receive a different spirit which you did not receive, or a different gospel which you did not accept, you put up with [it] well [enough]!

Or did I commit a sin [by] humbling myself in order that you may be exalted, because I proclaimed the gospel of God to you without payment?