At some point in my life I came up with a definition of what is beautiful. I will not go into the exact details as to what prompted this but the definition has stuck with me:
Something is beautiful when looking at it, hearing it, feeling it, smelling it, tasting it or thinking it makes you feel happy.
Pretty simple really but it has made a huge difference in my life. I recognize so many people around me as beautiful. Being aware of it has made me even happier.