Jesus' beautiful words, quoted tonight at Mt Pleasant baptist church by John Dickson, apologist here:
“But I say to you who hear, Love your enemies, do good to those who hate you, bless those who curse you, pray for those who abuse you. To one who strikes you on the cheek, offer the other also, and from one who takes away your cloak do not withhold your tunic either. Give to everyone who begs from you, and from one who takes away your goods do not demand them back. And as you wish that others would do to you, do so to them."
“If you love those who love you, what benefit is that to you? For even sinners love those who love them. And if you do good to those who do good to you, what benefit is that to you? For even sinners do the same. And if you lend to those from whom you expect to receive, what credit is that to you? Even sinners lend to sinners, to get back the same amount. But love your enemies, and do good, and lend, expecting nothing in return, and your reward will be great, and you will be sons of the Most High, for he is kind to the ungrateful and the evil. Be merciful, even as your Father is merciful." Luke 6:27-36 English Standard Version (ESV)
The wonderful thing about these verses is that Jesus is telling us to do nothing more than He did Himself.
If one is one's own worst enemy, should one therefore love oneself? Yes, by receiving the forgiveness, grace, friendship of Jesus, Who is so gentle and kind and forgiving, that one might truthfully hope that by receiving from Him His friendship, then His Spirit, influencing and moving in our souls, might make us a little more like Him and more inclined to love those who hurt us and incline us to such gentleness ourselves.