The Upanishads, Part 1 (SBE01), by Max Müller, , at sacred-texts.com
1. Meditation on the whole 1 of the Sâman is good, and people, when anything is good, say it is Sâman; when it is not good, it is not Sâman.
2. Thus they also say, he approached him with Sâman, i. e. becomingly; and he approached him without Sâman, i. e. unbecomingly.
:3. And they also say, truly this is Sâman for us, i.e. it is good for us, when it is good; and truly that is not Sâman for us, i. e. it is not good for us, when it is not good.
4. If any one knowing this meditates on the Sâman as good, depend upon it all good qualities will approach quickly, aye, they will become his own 2.
23:1 Hitherto meditation on certain portions only of the Sâma-veda and the Sâma-sacrifice had been enjoined, and their deeper meaning explained. Now the same is done for the whole of the Sâman.
23:2 Cf. Kh. Up. III, 19, 4.