"He did not need man's testimony about man, for he knew what was in a man." - John 2:25
I don't ever want to generalize the male species in anyway. But I want to extrapolate scripture. God has made it clear that out of the abundance of the heart the mouth speaks (Matthew 12:34, Luke 6:45) I think as people of God, people who are led by the Spirit should have discernment in the area of people of the world. You can see what people long for in their lives. You can see what they strive after. You can sense what they are feeling. If you choose to be aware of these things. Be slow to speak, slow to anger, and quick to listen (James 1:19). When you do these things, you can see what is in man. Man will make it CLEAR to you what is in their hearts.
"He who answers before listening - that is his folly and his shame." Proverbs 18:13, its clear that people who actually don't take the time to listen, who are quick to speak over you, are honestly foolish. Foolish because they aren't giving the other person a chance to voice their concerns. The foolish man doesn't care what you have to say essentially. Their opinion supersedes anyone else. You can just sit and watch people to see what kind of people they are. God has given us so much scripture and highlights things in people's character.
This just encourages me to shut up a ton and listen more. I want to be wise, and to be wise is to shush up most of the time. And then think before saying anything!