That's how you know that you're save. You have life, eternal life IF you love your brother. The sheep minister to the needs of the destitute. The goats do not care or don't take the time to care. The goats in fact can be somewhat responsible for the condition of the poor and distressed.
Old goats seem to have very little mercy for others.
I'm immersing you in scripture so that you can see that this is a theme of God's Word. And I think that every sermon needs to be preached from God's Word. That's where the power is. If it is possible, as far as it depends on you, live at peace with everyone. So you don't have to go out and hurt somebody.