Lukewarm people love others but do not seek to love others as much as they love themselves. Their love of others is typically focussed on those who love them in return, like family, friends, and other people they know and connect with. There is little love left over for those who cannot love them back, much less for those who intentionally slight them, whose kids are better athletes than theirs, or with whom conversation is awkward or uncomfortable. Their love is highly conditional and very selective, and generally comes with strings attached.
“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, so that you may be sons of your Father who is in heaven. For he makes his sun rise on the evil and on the good, and sends rain on the just and on the unjust. For if you love those who love you, what reward do you have? Do not even the tax collectors do the same? And if you greet only your brothers, what more are you doing than others? Do not even the Gentiles do the same?
He said also to the man who had invited him, “When you give a dinner or a banquet, do not invite your friends or your brothers or your relatives or rich neighbors, lest they also invite you in return and you be repaid. But when you give a feast, invite the poor, the crippled, the lame, the blind, and you will be blessed, because they cannot repay you. For you will be repaid at the resurrection of the just.”