Caitanya Mahāprabhu, mahā-vadānyāvatara, He is patita-pāvana. He is the deliverer of all the fallen souls. He has given us this much tapasya prescription. Tapasya must be there. And that is very easy to be done by us. It is not very difficult. One has to become very humble. That is the first qualification. Tṛṇād api sunīcena. Sunīcena means lower than the grass. Just like we trample over the grass; they do not protest. Tṛṇād api sunīcena taror api sahiṣnunā. And tolerant, humbler than the grass and tolerant than the tree. A tree gives us all benefit, but in return we give the tree so much trouble. We snatch away the twigs, we snatch away the leaves. Sometimes for our fuel we cut down. But there is no protest. So these things have been taught by Caitanya Mahāprabhu. Tṛṇād api sunīcena taror api sahiṣnunā amāninā mānadena. Nobody should think himself that he is very prestigious person, falsely. Nobody is prestigious. Everyone should be humble. So these three, four things we should learn, and that is tapasya. And we should avoid the sinful activities, namely, no illicit sex, no meat-eating, no gambling, no intoxication. These are some of the positive and negative formulas given by Caitanya Mahāprabhu. And if we follow this tapasya and chant Hare Kṛṣṇa, then our life is successful.
Life is successful means, it is stated here, sattvaṁ śuddhyed yasmād brahma-saukhyaṁ tv anantam. We are, every one of us, we are after happiness, sukham. From sukham it has come saukhyam. That happiness, if we want to continue our eternal life, then we require eternal happiness. Without happiness our life is not worth. Ānandamayo 'bhyāsāt (Vedānta-sūtra 1.1.12). Everyone should be happy, ānandamaya. That is spiritual world. Ānanda-cinmaya-rasa-pratibhāvitābhis tābhir ya eva nija-rūpatayā kalābhiḥ (BS 5.37). There is life, ānanda-cinmaya-rasa. Not jaḍānanda. This is jaḍānanda. In the material world, the material happiness is jaḍa. There is no life. But there is a place which is full of eternal happiness. So this life should be engaged for that purpose, not to fight like cats and dogs. That is not very credit. Credit means ruining one's life. If one fights like cats and dogs, he becomes cats and dogs. Nature's law is very strict. Therefore we should be very careful not to become like cats and dogs but to become very humble—humbler than the grass and tolerant than the tree. Amāninā.