Well according to Douglas Adams "Infinity itself looks flat and uninteresting. Looking up into the night sky is looking into infinity -- distance is incomprehensible and therefore meaningless." [chapter 24]
Another word not easy to draw. But the first thing that came to my mind was Buzz Lightyear and his cry of 'To Infinity and Beyond!'
The only thing I could think of to quill was the symbol for infinity:
I'm a little late this week as I have a very sick kitty - she's 16, has renal failure and is not eating much. I love my little fur baby to pieces. That's her picture on my icon -- her name is Kaliko. So sad.