Good Seed, Bad Seed

Only two types of people in the world; tares and wheat, goats and sheep, children of God and children of the devil. Which are you?
Who are the 'good seed' which Christ spoke of? What makes them good?
How can you tell the difference between wheat and tares when they may look the same outwardly?
It behooves us to know which we are, for the tares will burned in the fires of hell while the wheat will be gathered into God's Heaven.