According to Honore de Balzac a love is the best religion and a person who is in love will give everything to the one he or she is in love with and that person will never even have to ask about it. it is thelove that makes us the most generous and kind people in the world and that makes us give everything we have to people we are in love with.
Francois de La Rochefoucauld

Francois de La Rochefoucauld is a French writer and he is also the one who was thinking about love and he has his own point of view to love peculiar for people of this world. So, he was never thinking about the strict definition of love but he pointed out one peculiar feature of love and according to that feature we can make up our mind about the phenomenon of love.
So, his thought was about the distant relationships and he said that separation for love is like a wind for fire. In case the love is huge this wind will only multiply its strength and in case it is not a fire but a candle than wind will blow out this candle. That is how he thinks about love and about the separate for love. And he is right in this though.
There are a lot of people in the world who love each other but who have no opportunity to live with each other. They are people from different ends of this earth and they try to keep their fire burning. Though, most of them fail to do that. In case you love a person you can't imagine your life without him or her and the fact you can't see this person only makes you love him or her stronger.
But, in case it is not a love but desire or something you soon will get tired of this separate and will find a person who is next to you in order to satisfy your desire and passion. That is the one of a good number of common features of real love.