Chanakya, the ancient philosopher, forbade certain kinds of people from entering your home in his book Arthashastra.
Chanakya counseled against becoming friends with people who do not know the Vedas because they impart vital life lessons.
Stay away from folks who purposely damage others and have no sorrow.
When circumstances are hard, true friends support you. Those who just show up when they need something should not be taken seriously.
Those that manipulate your thoughts are dangerous and cunning; don't trust them.
Chanakya stated some people act honestly yet speak poorly about you when you're not there.
Steer clear of negative talkers because they can also depress you.