# Chāndogya Upaniṣad quoted * on following ācāryas, [[sb/4/22/24#purport|SB 4.22.24]] * on knowledge from spiritual master, [[sb/4/28/65#purport|SB 4.28.65]] * on knowledge via spiritual master, [[sb/10/10/10#purport|SB 10.10.10]] * on life as center of ability & activity, [[bg/7/19|Bg. 7.19]] * on Lord’s expansions, [[sb/10/1/56#purport|SB 10.1.56]] * on sat, 17.23 * on Supreme Lord * on tat, 17.23