"Love cures people,both the ones who give and the ones who receive it-Dr Karl Menninger.
I like this quote because it says it all,knowing that just one person loves you so much,at times more than yourself,is enough reason for you to continue with life. And the fact that someone appreciates the love you extend to them makes you happy and want to do more.
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I also love this,because when you love someone you are promising the person to give him/her your all;your care,your property,your loyalty and all others.