CS Lewis on the Christian love

Do not waste time bothering whether you ‘love’ your neighbor; act as if you did…Consequently, though Christian charity sounds a very cold thing to people whose heads are full of sentimentality, and though it is quite distinct from affection, yet it leads to affection. The difference between a Christian and a worldly man is not that the worldly man has only affection of ‘likings’ and the Christian has only ‘charity’. The worldly man treats certain people kindly because he ‘likes’ them; the Christian, trying to treat everyone kindly, finds himself liking more and more people as he goes on - including people he could not even have imagined himself liking at the beginning.
— CS Lewis, Mere Christianity, 116-117