Chasidut do Rodzaju 45:28

Genesis 45,28. “my son Joseph is still alive.” These ‎words, though apparently unnecessary, reflected Yaakov’s joy ‎that his son after these 22 years of being alone in Egypt had ‎remained true to his tradition and the teachings of his father. In ‎spite of his having been exposed during all these years to every ‎perversion known to mankind, he had remained a tzaddik. ‎The word ‎עוד‎, in this verse emphasizes that the “cultural” ‎influence exuded by Egyptian society, though powerful, was ‎relatively secondary, peripheral, an “also ran,” seeing that Joseph ‎had absorbed the largesse that originated from G’d in heaven, a ‎predominant, and more powerful influence.‎