Verse 8

प्रह्लादो ह्यात्मनैवैनं वरमर्जितवान्स्वयम् ।स्वत्रं विचारगं कृत्वा स्वयं विदितवान्मनः

In plain words

Prahlāda, indeed, by the ātman alone, himself won this boon; having turned his own mind toward inquiry, he came, by himself, to know his own mind.