Beautiful question in its simplicity and hard to answer. I think that beauty makes us feel good and happy. Beautiful things make us feel more desirable and beautiful ourselves (though this might not be always the case objectively).  As beauty in people is in the eye of the beholder, we feel comforted and happy near people we consider beautiful. Beautiful ideas, music and art pieces are there to inspire us to greater things, they are the dream element in our everyday’s life.

Beautiful question, and great answer Dana. I'm not sure you meant it as I read it, but let me give an interpretation of what you say:
You say: "As beauty in people is in the eye of the beholder, we feel comforted and happy near people we consider beautiful."
You might have meant it in the sense of objectivity and subjectivity (see nice discussion on Does objective beauty exist? ), but I want to read it as saying that beauty is actually, physically, in the eye of the beholder. That is, that it belongs to the person looking not the object/person looked at. That in a way it is better to look at beauty than be it, as the person looking is the person who actually has it.

You say: " Beautiful ideas, music and art pieces are there to inspire us to greater things, they are the dream element in our everyday’s life." I cannot avoid thinking of Madam Bovary, and how beauty made her dream. It is also a danger of beauty - the femme fatal (or Narcissus).  

Just to add a few strokes to the very nice remarks made...

One important point seems to be that, if I can say this right, crossing the slight distance between the pleasant and the beautiful moves us into the realm of enormous expectations. There is an intensity, an absoluteness to what people desire (one might even say, demand) from what is beautiful, which they do not dare/dream of asking from that which is not. What produces this sudden intensity? As in Goethe's famous line that "the beautiful is a manifestation of secret laws of Nature, which, but for this appearance, had been forever concealed from us." 

There's a clue here, I think -- what leads people to believe that our sense of beautiful is somehow calibrated to reveal those regions where the veneer of everyday life wears thin, so that something astonishing shows through? What is so strong for people here?