[RyanMcGreal]

Maybe the idea is that a competent programmer is also humble.

[irrelative]

And, I'd add, not humble naturally but got that way by being humbled again and again by his knowledge.

[RyanMcGreal]

Yes, exactly! I didn't become the half-decent programmer that I am until I finally embraced the fact that my code sucks and adopted highly defensive coding practices as a result.

[mprime]

I guessed that was the meaning a long time ago, but it's just amusing to read it literally.