Acts of Kindess-
I think what makes me smile that I find most beautiful in life is when I see those who help others, and in return there's a sense of gratitude, generosity/appreciation one has for another.
I used to work at a pharmacy, and I remember a guy who couldn't speak english so his grand-daughter (about 7 years old), sat there and waited with him for his medication. She was his interpreter. The guy waited for over an hour (way too long). Soon as I stepped out to go to lunch and saw his grand-daughter sitting there next to him, all patient, while he looked extremely fatigued, something about that moment made my heart melt.
Anyway, to make a long story short, I went back in, placed his order to 'priority', and when I left, they were really thankful. I think it was his grand-daughter's simple act of kindness, and that guy's nature of humbleness/appreciation for his grand-daughter & the whole situation that really left an impression on me.
That's true beauty right there.