Bhagavad Gita · Chapter 13: The Field and the Knower of the Field

Bhagavad Gita 13.3

tatkṣetraṃ yacca yādṛk ca yadvikāri yataśca yat | sa ca yo yatprabhāvaśca tatsamāsena me śṛṇu ||

Hear from me in brief what that field is, what it is like, what changes it undergoes, and where it comes from; and who the knower is and what his powers are.

Modern context

Krishna lays out the plan of what he will teach: what the field is, what it is like, how it changes, where it comes from, and who the knower is. A good teacher often begins this way, showing the shape of the lesson before filling it in. Knowing where one is going makes it easier to follow along.