Joy.A state of happiness or felicity, Bliss.
Joy is the feeling you get after you have helped another. Smiling at others as you pass them on the street; holding the door for a wheelchair; taking time to say "how are you" and waiting for the answer; being patient with others; teaching an adult how to read; holding the hand of a frightened child; giving to those who ask; visiting a shut-in and offering to run an errand; visiting the sick in the hospital; being there at the moment of death. These things add up, the more you do, the more joy you feel. The more love you hold.
"Joy in looking and comprehending is nature's most beautiful gift."
Albert Einstein, German-American physicist,
Nobel Prize for Physics in 1921, 1879-1955