A good traveler has no fixed plans and is not intent upon arriving. A good artist lets his intuition lead him wherever it wants, tears are irrevocably shed to depict the incentive in natural art when cutting onions.
Onions release an enzyme called lachrymatory factor synthase when cutting them. This starts the process that leads to tears. This enzyme then reacts with amino acids of the onion and the amino acids are converted to sulfenic acids.