Kena Upaniá¹£ad takes its name from the first word of its first verse. Kena (by whom) in this upaniá¹£ad points to the Supreme Lord, who inspires and instigates everything into action. Kena upaniá¹£ad is one of the ten upaniá¹£ads that both Åšaá¹…karÄ and Madhva wrote commentary upon. It's part of TalavakÄra BrÄhmaņa of the SÄmaveda.This upaniá¹£ad contains four parts also known as khaṇá¸as. The first khaṇá¸a distinguishes the Supreme Lord from the material senses which are controlled by him, and whom can't be perceived by these senses. The second khaṇá¸a points out that the Supreme Lord is unlimited and can't be fully understood by jÄ«vas, and realization of the Lord saves one from the saá¹sÄra. The third khaṇá¸a relates a story of how the Lord broke the pride of the devatÄs by showing them that he's the ultimate cause behind everything. The story is concluded in the fourth khaṇá¸a with description of some more qualities of the Lord.I have used the commentary of Ranga RÄmÄnuja, for the meaning of the verse, and explanation of points. However, I have not translated the full commentary, but rather took the essential points necessary for elementary understanding.