The most popular answer seems to be the love a mother has for her child or the love shared between siblings. Though I am fairly certain I am not a mother, I absolutely can see without a doubt the strength of that connection. As for sibling love, I know that if it weren't for the genetic relatedness inherent in the DNA of the blood coursing through myself and my brother's respective veins, I would probably hate the guy. Yet, I love the kid - always have, always will. So to that end, it certainly is quite strong.
My answer, however, is a bit more general: I argue that the strongest kind of love is one where - no matter what you do, no matter how hard you try, no matter what anyone or anything else tells you - you can't not love them. Think about the two examples I just gave. A mother can't choose to not be the mother of her child. She likewise can't not love her child. I can't choose to not be my brother's brother and for the same reason I can't not love him. Or is there indeed a choice?
Are there other instances in which one could love someone so much that, no matter what, they will still love them? A situation in which relatedness is not involved? I would say yes.
I think, ironically, the love we feel for ourselves isn't built this way, but it should be. The love of the self should stand strong, even in the face of our mistakes, our regrets, our flaws. No matter what, you should love yourself.
Let's take this even further. I think - in very unique circumstances - someone could meet someone else, fall in love, and, even if the relationship dissolves, even if they have a falling out, they move on, they still retain that same undeniable love, no matter what. This can happen between friends or lovers. I think it is a rarity, but even if the other person goes on and falls in love with someone else, that unconditional love will persist between them, maybe even only by one person. That I think that is what unconditional love is. No matter what he or she does, no matter what conspires, no matter how much you try and push them out of your mind, to escape them, you still love them. And that's ok.
People have disagreed with me on this (some even saying, "That sounds like it sucks"), but I want to know what you guys think. What is the strongest kind of love? Leave a comment below.