A smile is the most typical trickery used to conceal emotion. If you look well into the smile, you can see the person’s intention. What is being hidden in that friendliness?
Beware! Be vigilant. We’ve come to the age where humans speak the opposite of what they feel. Be cautious. Don’t befriend everyone. They utter florid words when you’re with them but in the end they’ll lead you to your demise. They’ll be the cause of your destruction. They want to see you stumble. And when you’re left with nothing, they’ll scorn you at your own face.