The ultimate meaning of the active life is to make possible the happiness of contemplation.
Happiness and joy are not the same. For what does the fervent craving for joy mean? It does not mean that we wish at any cost to experience the psychic state of being joyful. We want to have reason for joy, for an unceasing joy that fills us utterly, sweeps all before it, exceeds all measure.
Happiness is essentially a gift; we are not the forgers of our own felicity.
The "supreme good" and its attainment - that is happiness. And joy is: response to happiness.