All things are built from the heart
一切唯心造 is a Buddhist terminology meaning "all things are built from the heart." Depending on how we control our minds, we either feel like we are in heaven or go to hell and back. The crisscrossing lines depict mixed feelings of agony we constantly feel that arise from our worries, temptations, grief, rage, and frustration. The empty circle represents the tranquil and peaceful state of mind, away from all the agony and unpleasant thoughts.