Zechariah 1:2-6 (NIV)
2"The Lord was very angry with your forefathers.
3Therefore tell the people: This is what the Lord Almighty says: 'Return to me,' declares the Lord Almighty, 'and I will return to you,' says the Lord Almighty.
4Do not be like your forefathers, to whom the earlier prophets proclaimed: This is what the Lord Almighty says: 'Turn from your evil ways and your evil practices.' But they would not listen or pay attention to me, declares the Lord .
5Where are your forefathers now? And the prophets, do they live forever?
6But did not my words and my decrees, which I commanded my servants the prophets, overtake your forefathers? "Then they repented and said, 'The Lord Almighty has done to us what our ways and practices deserve, just as he determined to do.' "
Proverbs 27:17 (NIV)
As iron sharpens iron, so one man sharpens another.