'Age' in the Bible

Where is the wise man? Where is the expert in the Mosaic law? Where is the debater of this age? Has God not made the wisdom of the world foolish?

Now we do speak wisdom among the mature, but not a wisdom of this age or of the rulers of this age, who are perishing.

None of the rulers of this age understood it. If they had known it, they would not have crucified the Lord of glory.

Guard against self-deception, each of you. If someone among you thinks he is wise in this age, let him become foolish so that he can become wise.

For the wisdom of this age is foolishness with God. As it is written, "He catches the wise in their craftiness."