> One of the things I've tried to teach people I've mentored over the past few decades is the principle of "Sharing is better than assuming." If you know something, share it with other people.

Definitely agree with this in principle. My son and I play pool (billiards) competitively. As you get better, almost nobody shares any tips because it's very competitive. I've taught him to be better than that and we have a great league team where everyone is helping the others grow.

In the mentoring (not just teaching) realm, I like to guide them into asking the questions that gets them to the answer they're looking for. When the connections in their mind light up, it's amazing.