Love

As per Kabir :

Pothi Padh Padh Kar Jag Mua, Pandit Bhayo Na Koye
Dhai Aakhar Prem Ke, Jo Padhe so Pandit Hoye
[Reading books where everyone died, none became anymore wise
One who reads the word of Love, only becomes wise]

As per Sri Sri 

What are the signs of love? When you love someone you see nothing wrong in them. Even if you see a fault in them, you justify it in some way saying, "Everyone does that; it is normal." You think you have not done enough for them and the more you do, the more you want to do for them. They are always on your mind. Ordinary things become extraordinary. When you love someone, you want to see them happy always and you want them to have the best.

As per Krishna

He mentions in the Gita about oneness and duality. There is also a mention about when you love all as your own then there is no jealousy and negative feelings. It is a beautiful world

Lots has been said & written about LOVE and more will be said & written.