Sāttvik food, tāmasik mood. Words from your grandmother’s kitchen come from the three guṇas the Gītā names: sattva, rajas and tamas.
Going deeper
Chapter 14 is the Gītā's chapter on the three qualities. 14.4 says that whatever forms are born in any womb, Prakṛti is their great womb and Kṛṣṇa is the sowing father. 14.5 then names the three guṇas that arise from Prakṛti, sattva, rajas and tamas, and says they bind the unchanging self in the body. 14.6 describes the first: sattva, being free of impurity, is luminous and free from sickness, and it binds through attachment to pleasure and to knowledge. So even the best of the three is described as binding. The story hears these words in a grandmother's kitchen, in sāttvik food and tāmasik mood. In the Gītā they are three qualities that arise from Prakṛti and act on the one in the body. See chapter 14 and what the Gītā says about knowledge.