एवमेतद्यथात्थ त्वमात्मानं परमेश्वर। द्रष्टुमिच्छामि ते रूपमैश्वरं पुरुषोत्तम ॥

evam etad yathāttha tvam ātmānaṁ parameśhvara draṣhṭum ichchhāmi te rūpam aiśhwaraṁ puruṣhottama

O supreme Lord, even as Thou describest Thyself, O best of beings, I desire to see Thy Form omnipotent.

In plain words: Arjuna says he believes what Krishna has told him about himself. Now he wants to actually see Krishna's all-powerful divine form.