Paul the Apostle taught that the preaching of the gospel power of God. What is the gospel.
Romans 1:9
9 [FONT=Helvetica Neue, Verdana, Helvetica, Arial, sans-serif]For God is my witness, whom I serve with my spirit in the gospel of his Son, that without ceasing I make mention of you always in my prayers;[/FONT]
[FONT=Helvetica Neue, Verdana, Helvetica, Arial, sans-serif]1 Corinthians 1: 17
[/FONT]17 For Christ sent me not to baptize, but to preach the gospel: not with wisdom of words, lest the cross of Christ should be made of none effect.
18 For the preaching of the cross is to them that perish foolishness; but unto us which are saved it is the power of God.
2 Corinthians 4:3
But if our gospel be hid, it is hid to them that are lost:
4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.
5 For we preach not ourselves, but Christ Jesus the Lord; and ourselves your servants for Jesus' sake.
Galatians 1:5-7
5 To whom be glory for ever and ever. Amen.
6 I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel:
7 Which is not another; but there be some that trouble you, and would pervert the gospel of Christ.
The Gospel is Christ and Him crucified and not law keeping or Daniel fast keeping or anything we can do.