Verse 90

उद्दालकस्तदारभ्य व्यवहारपरोऽपि सन् ।सुसमाहित एवासौ चित्तत्त्वैकत्वमागतः

In plain words

From that time forward, Uddālaka, even while engaged in the world's affairs, being ever well-collected within, had come to oneness with cit-tattva.