na nāga-vadhvo ’rhaṇa īśire hriyā
Anyone who remains unagitated, even in the presence of cause for agitation, is called dhīra, or equipoised. The Supreme Personality of Godhead, being always in a transcendental position, is never agitated by anything. Therefore someone who wants to become dhīra must take shelter of the lotus feet of the Lord. In Bhagavad-gītā (2.13) Kṛṣṇa says, dhīras tatra na muhyati: a person who is equipoised in all circumstances is never bewildered. Prahlāda Mahārāja is a perfect example of a dhīra. When the fierce form of Nṛsiṁhadeva appeared in order to kill Hiraṇyakaśipu, Prahlāda was unagitated. He remained calm and quiet, whereas others, including even Lord Brahmā, were frightened by the features of the Lord.