Bhagavad Gita · 10.17

कथं विद्यामहं योगिंस्त्वां सदा परिचिन्तयन्।केषु केषु च भावेषु चिन्त्योऽसि भगवन्मया॥

kathaṁ vidyām ahaṁ yogiṁs tvāṁ sadā parichintayan keṣhu keṣhu cha bhāveṣhu chintyo 'si bhagavan mayā

How may I know you, O Supreme Yogi, by constantly meditating on you? In what various forms are you to be contemplated by me, O Lord?

— Bhagavad Gita 10.17

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)