'Love' in the Bible

But I have this against you, that you have left your first love.

‘I know your deeds, and your love and faith and service and perseverance, and that your deeds of late are greater than at first.

Those whom I love, I reprove and discipline; therefore be zealous and repent.

And they overcame him because of the blood of the Lamb and because of the word of their testimony, and they did not love their life even when faced with death.