Kaṭha Upaniṣad 2.20

2.20

aṇor aṇīyān mahato mahīyān ātmāsya jantor nihito guhāyām /
tam akratuḥ paśyati vītaśoko dhātuprasādān mahimānam ātmanaḥ //

20. More minute than the minute, greater than the great Is the Soul (Ātman) that is set in the heart of a creature here. One who is without the active will (_a-kratu_) beholds Him, and becomes freed from sorrow—

When through the grace (_prasāda_) of the Creator (_dhātṛ_) he beholds the greatness of the Soul (Ātman).