'Gospel' in the Bible

Now when I came to Troas for the gospel of Christ, and when a door was opened unto me in the Lord,

And even if our gospel is veiled, it is veiled in them that perish:

in whom the god of this world hath blinded the minds of the unbelieving, that the light of the gospel of the glory of Christ, who is the image of God, should not dawn upon them .

And we have sent together with him the brother whose praise in the gospel is spread through all the churches;

seeing that through the proving of you by this ministration they glorify God for the obedience of your confession unto the gospel of Christ, and for the liberality of your contribution unto them and unto all;

For we stretch not ourselves overmuch, as though we reached not unto you: for we came even as far as unto you in the gospel of Christ:

so as to preach the gospel even unto the parts beyond you, and not to glory in another's province in regard of things ready to our hand.

For if he that cometh preacheth another Jesus, whom we did not preach, or if ye receive a different spirit, which ye did not receive, or a different gospel, which ye did not accept, ye do well to bear with him .

Or did I commit a sin in abasing myself that ye might be exalted, because I preached to you the gospel of God for nought?