“Love” is the strongest, beautiful and most powerful emotion in the world. Unfortunately, in the changing world, it's hard to find it because it's been mixed with other desires. Love that involves lust, expectations and any other intention is not the pure one.
The purest Love, I believe, is the one that don't include any other emotions, but just selflessness. The one you do to a random child. The one God does to His children, Us, is the purest Love.