In a group setting, if someone is trying too hard to prove others wrong, let them be right. They are less curious to learn and more furious to prove.
If on the other hand, someone is asking questions, try to be around them and learn from them. They care little about what you think about their choices and more about what they can learn from you.
A bit of stardust of everyone rubs off on to us. It is up to us to pick sand or gold.