tad-buddhayas tad-ātmānas tan-niṣhṭhās tat-parāyaṇāḥ
Meaning: Those whose intellect is fixed in God, who are completely absorbed in God, with firm faith in Him as the supreme goal, such persons quickly reach the state from which there is no return, their sins having been dispelled by the light of knowledge.
tat-buddhayaḥ—those whose intellect is directed toward God;
tat-ātmānaḥ—those whose heart (mind and intellect) is solely absorbed in God;
tat-niṣhṭhāḥ—those whose intellect has firm faith in God;
tat-parāyaṇāḥ—those who strive for God as the supreme goal and refuge;