In plain words
After a while Aśvatthāmā came and asked, “Swami! Can you tell me where the Pāṇḍavas are?” Durvāsa pretended anger and raised his voice: “The Pāṇḍavas? They are under me!” he said. Seeing Durvāsa's anger, Aśvatthāmā was afraid that he might curse him somehow, and ran away from there. In this way, because Durvāsa changed the sound of his voice, the Pāṇḍavas were saved. Ṛṣis, yogis and jñānis go on like this, protecting and correcting by their words.
“Such a great ascetic, and yet Durvāsa has so much anger?” many people criticise, out of Ajñāna. But only those who do not see the inner meaning of that anger talk like this. God has no anger at all. One who has anger is not God at all. Yet, to protect His devotees, He acts as the moment requires. In the ṛṣis there is no such thing as anger at all. Some teach that one must practise tapas to conquer anger; for this no tapas at all is needed. It comes quite naturally.
Parents have no anger, only Prema
If we wish to win God's favour, it is enough to bow to our parents' command out of Prema. There is no God greater than parents. With great toil they reared you and brought you on in life. On some occasions parents may seem to be angry with their son, or to beat him. Yet, wishing for their son's progress, they show anger as the occasion calls for it, but in truth parents never have any anger towards their son. Whatever words they speak, they are words spoken with Prema, not words that come from anger. In them Prema is beyond measure. That boundless Prema alone goes on nourishing the children. A small example: when her son does wrong, the mother gives him a smack. How does she strike? There is a lot of noise, but the blow does not hurt. Because the mother has no anger. Even when she shows anger, it comes from Prema itself! So we must never think that our parents are angry with us. If your parents themselves were angry, could you survive?