Who is too old to learn is too old to teach

You can't teach an old dog new tricks.

Learn young, learn fair; learn old, learn more

Be eager to learn from those willing to teach.

My father told me once that we are on earth to learn. God wants us to receive everything that life was meant to teach. Then we take what we've learned, and it becomes our offering to God and to mankind. But we have to live in order to learn. And sometimes we have to fight in order to live.

And gladly would he learn, and gladly teach