When I was a teenager, I thought I knew everything and didn't need anyone's advice. (Can y'all relate?) However, as I've grown, I realize that there's much to be learned from listening to good counsel and receiving instruction from others with more experience or knowledge in certain areas. In fact, it's Biblical to get learning from others (and from the Word, of course).
Listen to counsel and receive instruction,
That you may be wise in your latter days.
There are many plans in a man’s heart,
Nevertheless the Lord’s counsel-that will stand.
This is such a good (and needed) reminder for those of us who might occasionally revert to the I-know-it-all mentality, right! :)