'Evidence' in the Bible

And when I came to you, brothers and sisters, proclaiming to you the testimony of God [concerning salvation through Christ], I did not come with superiority of speech or of wisdom [no lofty words of eloquence or of philosophy as a Greek orator might do];

Why, the very fact that you have lawsuits with one another is already a defeat. Why not rather be wronged? Why not rather be defrauded?

Was anyone at the time of his calling [from God already] circumcised? He is not to become uncircumcised. Has anyone been called while uncircumcised? He is not to be circumcised.

If I am not an apostle to other people, surely I am one to you, for you are the evidence of my apostolic authority from the Lord.

But to each one is given the manifestation of the Spirit [the spiritual illumination and the enabling of the Holy Spirit] for the common good.