From the Bible:

Gospel of St. Matthew, Chapter 5:

Love your enemies; bless them that curse you; do good to them that hate you; and pray for them which despitefully use you, and persecute you; . . .

If ye love them which love you, what reward have ye? Do not even the tax collectors the same?

And if ye salute your brethren only, what do ye more than others? Do not even pagans so?

Be ye therefore perfect, even as your Father which is in heaven is perfect.

From the Bhagavad Gita, seventh Chapter:

Out of thousands, one strives for spiritual attainment; and out of many blessed true seekers, who strive assiduously to reach Me, one, perhaps, perceives Me as I am.