Jesus said to his disciples:
“You have heard that it was said,
You shall love your neighbor and hate your enemy.
But I say to you, love your enemies,
and pray for those who persecute you,
that you may be children of your heavenly Father,
for he makes his sun rise on the bad and the good,
and causes rain to fall on the just and the unjust.
For if you love those who love you, what recompense will you have?
Do not the tax collectors do the same?
And if you greet your brothers and sisters only,
what is unusual about that?
Do not the pagans do the same? So be perfect, just as your heavenly Father is perfect.” 



It is no longer "do to others as you would want it done to you.." No, it is now "love others as I have loved you."  We are no longer the standard of behavior.  It is now Jesus.  His standard should now govern our behavior, if we want to be called his disciples.  Tall order.  But it must be possible.  Difficult but it must not be impossible.  For what kind of a God will command something impossible? What kind of a God will set us up for failure?  God does not command the impossible.  It all depends on one's definition of "love."  Love is not an emotion (spiritual love that is).  Love is an act of the will.  I can love someone I do not particularly like without the effervescence of emotion. It happens in Community life.  Not all Sisters are likable.  Some just have the knack to jar my nerves without trying hard.  But I try to rise above emotions and see in her the special person God loves.  Difficult, yes.  Challenging, definitely.  Impossible, no.