The song is really, really beautiful. But I kinda don't like the parts where Meera is made out to be superior than Radha, I know that was important from the movie POV, but then their journeys were different from each other and it would be unfair to compare them.
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In my view, Radha was special not because Krishna was 'smitten' by her. Krishna is never 'smitten' by everyone. But sure, Radha did sweep his off his feet, but that wasn't beauty. Sure, she was beautiful, but more than that, she was one of the FEW persons (Nand and Yashoda being the others) who considered him MORE than a/the God.
It's, in my opinion, a most beautiful thing- to care about someone more than God (remember all these peeps were pretty religious people so...).
Basically, God does all his Leelas to teach mankind various lessons. But have you ever thought, whether he did that willingly? Or are we, his creations, so insufferable, that he has to constantly do his 'antics' to keep us in line?
Personally, I don't think so. Apart from the 'lessons' part, the Lord also likes to get sown here and, you know, kinda go with it.
You know, while he was busy looking out for the world, killing demons and counseling people into dharma, and what, there were these FEW people who took care of him while he took care of the world.
Yashoda always made sure he was warm, wed-fed and generally happy without really worrying how many demons he killed. She was always afraid Krishna would hurt himself, and nope, she wasn't worried about him losing or something- she just didn't want precious darling hurt (or, just tired) because a bunch of nutcases were insecure!
Nand baba, on the other hand, always stood with him in all situations, as a friend would do...he would make Yashoda back off when she didn't let Krishna fight, and for God's sake, the man alone fought against a thousand of years' worth of tradition to make sure Krishna's will was done (Govaradhan)!
And Radha, always made sure that He knew that people cared. She would dress up, flirt with him etc! In most songs, if you notice, Radha is found tending to him. Feeding him, laying him a cool bed, and kinda just letting him cool down. She always made sure Krishna has a cool place to rest and a patient ear to vent (if he needed). Yes we was jealous, and possessive, but I believe a part of that was also because the other Gopis didn't know him that well! They all wanted Krishna to love them, but Radha just wanted to love Krishna, and make sure he loved back just like he deserved.
Also, the other people from Gokul and Vrindavan, the beauty of their relation with Krishna was that, they all loved him like their equal. Yes they also looked up to him as their leader and stuff but all the same, he wasn't really treated differently. You know, they never made him feel like an outsider. You'd say, they don't know but come on, you can't just spend half of your life and not realize he's divine. Everyone knew he was different, but they couldn't care any less because Krishna was their friend and nothing was ever gonna change that.
Krishna didn't really get much of that in his life. Arjun, a little bit, maybe, but still he kept his distance. But this really explain why Krishna was SO fond of him.
You know they say God made man in his own image, so it is but natural for humans to treat him as an equal. Well, not an equal even, God is like a mirror, you can't hide from them and so you're better off being friends. You know you can mistreat people beneath you and you can feign respect for those above but you can't EVER mistreat a person you mark as an equal.
And as far as the person in the mirror is concerned, you can't harm them even if you try because whatever you throw at a mirror comes back to you.
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As for Meera, she had more of a devotional kinda love and that was beautiful as well. Not many people have the courage to give everything up for that one thing.
Her love was equally selfless as Radha, only the nature of it changed. Radha was lucky enough to have done something for Krishna in real life while Meera only dreamed of it.
Meera's love I assume stems from the heavy losses she suffered early in life. And you know, by the turn of faith as she was left bereft of all friends and family at a tender age, she turned to the only option she had, i.e. her Giridhari, and made him her best friend, lover, guardian.
What she did was break free from the clutches of patriarchy with Krishna at her lead and that was some real courage given her surroundings! On the devotional front, she dedicated everything, including her living breaths and her conscience to Krishna and that is one of the greatest forms of love that you can have for someone!
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The basic difference between Radha and Meera's love lied in the point that Meera, in all the difficulties of life that faced, surrendered all her worries and fears to Krishna and walked forth. Radha on the other hand, did her best to hide her own fears and trepidation from Krishna so that the latter could move on in his life without being guilty for putting her through the troubles that ensued.
I feel, both these attitudes were very dear to Krishna and he cherished them both.