Butterfly.

...what goes around comes back around; this is nature's way.

be conscious of what you do, because you will be repaid.

if you put turnips in the ground, you will not harvest grapes.

you are what you attract, and this is why I say:

if you want a butterfly, you've got to be a butterfly. 

-(india.arie "butterfly")

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I say this to people a lot. Well, maybe not exactly in reference to butterflies, but more the gist of this lyric, which is that people will treat you how you let them. 

Let me say that a different way: what you think you deserve is exactly what you’ll get.  If you feel poorly about yourself, and believe yourself unworthy of being treated well, you cannot rightfully be surprised when you find yourself involved with someone who doesn't treat you particularly well. That's not to say if someone treats you like garbage, you deserve it. Nobody deserves anything less than to be treated respectfully and with kindness. But it's not enough to hope for that; you have to require it. You must be courageous and willing to walk away from a situation where you're not getting -and giving- respect and appreciation. If you plant turnips in the ground, you will not harvest grapes. Which is to say: you have a responsibility to be the best version of yourself possible, and to treat the people in your life as you'd like them to treat you. Be nice. Be patient, and kind, and not an a**hole. And sure, sometimes you have to teach people how to treat you, and sometimes they turn out to be worth the effort, but sometimes they don't. And that's okay. If you do an inventory, get right with yourself, start feeling good and knowing your own worth, you're more likely to attract the sort of partner you want and deserve.