Joseph in his highest meaning represents the life of Jesus. He also represents the state of knowing truths and using them to do good. This is phrased in many of the attached references as the celestial of the spiritual, or the good of truth, which is the good that is done because we know truths that are our guides to life.

(References: Arcana Coelestia 3969, 4607, 4669, 4682, 4741, 4988, 5036, 5094, 5249, 5316, 5876, 5890, 5974, 5975, 6275, Genesis 30, 30:24, 30:25)