1Co 2:1-5. And I, brethren, when I came to you, came not with excellency of speech or of wisdom, declaring unto you the testimony of God. For I determined not to know any thing among you, save Jesus Christ, and him crucified. And I was with you in weakness, and in fear, and in much trembling. And my speech and my preaching [was] not with enticing words of man’s wisdom, but in demonstration of the Spirit and of power: That your faith should not stand in the wisdom of men, but in the power of God.
Jn 1:12-13. But as many as received him, to them gave he power to become the sons of God, [even] to them that believe on his name: Which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.
Jn 2:23-24. Now when he was in Jerusalem at the passover, in the feast [day], many believed in his name, when they saw the miracles which he did. But Jesus did not commit himself unto them, because he knew all [men],
Jn 3:6-8. That which is born of the flesh is flesh; and that which is born of the Spirit is spirit. Marvel not that I said unto thee, Ye must be born again. The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth: so is every one that is born of the Spirit.