Sri Ramakrishna: In our life we invoke the presence of God, karamatma samayata. We do it by worshipping God through our service of all beings, karma yoga. The one unchanging in the midst of all changing things is that one existence everywhere,. Everything else is just name and form, being imposed upon it. That's the meaning of tat tu amasi.
Swami Sarvapriyananda teaches Chapter 6 (Verse 7) of the Bhagavad Gita. In this series of talks, Swami Sarvapriyananda unfolds the highest truths of Vedanta through the study of the Bhagavad Gita (The Song of God).