दृष्ट्वेदं मानुषं रूपं तवसौम्यं जनार्दन। इदानीमस्मि संवृत्तः सचेताः प्रकृतिं गतः ॥

dṛiṣhṭvedaṁ mānuṣhaṁ rūpaṁ tava saumyaṁ janārdana idānīm asmi saṁvṛittaḥ sa-chetāḥ prakṛitiṁ gataḥ

Beholding again Thy gentle human Form, O Janârdana, I am now collected, and am restored to my own nature.

In plain words: Arjuna says that seeing Krishna's gentle human form again has calmed him. He feels like himself again. Janardana is another name for Krishna.