'By The Spirit' in the Bible

and my language and the message I preached were not adorned with pleasing words of worldly wisdom, but they were attended with proof and power given by the Spirit,

And these are just the characters some of you used to be. But now you have washed yourselves clean, you have been consecrated, you are now in right standing with God, by the name of our Lord Jesus Christ and by the Spirit of God.

To one, wise speech is given by the Spirit; to another, by the same Spirit, intelligent speech is given;

For whoever speaks in ecstasy is speaking not to men but to God, for no one understands him, and yet by the Spirit he is speaking secret truths.