From East of Eden by John Steinbeck it means ‘Thou mayest’ in Hebrew.
“This is not theology. I have no bent toward gods. But I have a new love for that glittering instrument, the human soul. It is a lovely and unique thing in the universe. It is always attacked and never destroyed— because ‘Thou mayest.’”
Done by the awesome Chris at Life After Death Tattoo, Costa Mesa, CA