“I will say this quite plainly, what truly human is -and don’t be afraid of this word- love. And I mean it even with everything that burdens love or, i could say it better, responsibility is actually love, as Pascal said: ‘without concupiscence’ [without lust]… love exists without worrying about  being loved.”
― Emmanuel Lévinas, Of God Who Comes to Mind

Here is a good article

 

And another