A Sādhu Is Never Angry. by His Divine Grace A.C.Bhaktivedanta Swami
Persons who undergo severe austerity (tapasya) become endowed with great mystic power, as evinced by the Pracetas, who were able to create fire and wind from their mouths. Although devotees undergo severe tapasya, however, they are vimanyavaḥ (devoid of pride), sādhavaḥ (obedient to scriptures), which means that they never become angry. They are always decorated with good qualities. Bhāgavatam (3.25.21) states:
A sādhu, a devotee, is never angry. Actually the real feature of devotees who undergo tapasya, (austerity), is forgiveness. Although a Vaishnava, a devotee of the Lord, has sufficient power due to his tapasya, he does not become angry when put into difficulty. If one undergoes tapasya but does not become a Vaishnava, however, he does not develop good qualities. For example, Hiranyakashipu and Ravana both performed great austerities, but they did so simply to demonstrate their demoniac tendencies.
Vaishnavas must meet many opponents while preaching the glories of the Lord, but Sri Caitanya Mahaprabhu recommends that they not become angry while preaching. Lord Caitanya Mahāprabhu has given this formula: tṛṇād api sunīcena taror api sahiṣṇunā/ amāninā mānadena kīrtanīyaḥ sadā hariḥ “One should chant the holy name of the Lord in a humble state of mind, thinking oneself lower than the straw in the street; one should be more tolerant than a tree, devoid of all sense of false prestige and should be ready to offer all respect to others. In such a state of mind one can chant the holy name of the Lord constantly.”
Those engaged in preaching the glories of the Lord should be humbler than grass and more tolerant than a tree; then they can preach the glories of the Lord without difficulty.
— Śrīmad-Bhāgavatam (Bhāgavata Purāṇa) » Canto 6: Prescribed Duties for Mankind » Chapter 4: The Haṁsa-guhya Prayers Offered to the Lord by Prajāpati Daksa, Verse: 6, Purport