Riddle Me This

Riddle me this a question I raise this thing I have found still keeps me amazed This thing has no weight or numbers or size there is little use seeing it for it confuses the eyes. It has no length though at times it is too short if you have figured it out, my your quite a sport If I‘ve got you stumped how about some more clues with out a little of this there would be no you. It has no smell and the taste isn’t there but if you have it people will stare it has no color though I have heard it can be blue some times with green eyes is that the right clue you can look your whole life and find it just once if it has not come to you yet please don’t feel a dunce I have heard people say it is sent from above if you need one more clue lets just call it love