Prasidhyati means you increase. What is that? Utsāha, endeavor. "In this life I must fulfill my mission of Kṛṣṇa consciousness." That is called utsāha. Dhairya. Don't be agitated because it is not giving result immediately. Just patiently go on working.
Utsāhād dhairyān niścayāt. Niścayāt means to have full faith in the words of Kṛṣṇa. Kṛṣṇa says, kaunteya pratijānīhi na me bhaktaḥ praṇaśyati (BG 9.31). This is called full faith, that "Kṛṣṇa has said that if I am in devotional service, I will never be lost. Kṛṣṇa will give me protection. Kṛṣṇa says." Ahaṁ tvāṁ sarva-pāpebhyo mokṣayiṣyāmi (BG 18.66). To have faith, this is called surrender. Not that, "Oh, Kṛṣṇa says, but may not be able to protect me." No. Kṛṣṇa is able. He is all-powerful, omnipotent. He can give you protection. When He says that ahaṁ tvāṁ sarva-pāpebhyo mokṣayiṣyāmi, that is a fact. This is called niścayāt. "Certainly Kṛṣṇa will give me protection." Not that "Because I do not see Kṛṣṇa, I do not know whether Kṛṣṇa will give me protection." No. That word is sufficient. This is called niścayāt. Utsāhād dhairyān niścayād tat-tat-karma-pravartanāt.
But you must follow the rules and regulation as it is enjoined in the śāstra. Not that "Kṛṣṇa will give me protection and I may do whatever I like. I can eat anything I like, I can do anything I like." Just some rascal advises that "There is no such thing, restriction, in the self realization. You can eat anything, you can do anything." People like that program. And as soon as there is restriction, they do not like. Because we put so many restriction, I am called in the western world, "Swamiji, you are very conservative." So we have to become conservative, follow the rules. Not that we give liberty, that "Whatever you like, you do, and at the same time you make progress, spiritual life." That is not possible.
Because spiritual life means tapasya. Formerly great, great saintly persons, they underwent very, very severe tapasya for thousands of years, hundreds of years. Then they attained success. In the Kali-yuga it is not possible to undergo such severe tapasya. There is concession. The concession is that you live a pure life and chant Hare Kṛṣṇa mantra. This will make sufficient. A pure life: no illicit sex, no intoxication, no meat-eating, no gambling. This is pure life. These boys and girls who have joined this movement, they have given up. They are not dying. Nobody will die if he lives a pure life. Anyone will make progress. Tapasā brahmacaryeṇa (SB 6.1.13). These are the injunction of the śāstra. If you want to be happy, this is the.... Tapo divyaṁ putrakā yena śuddhyet sattvam (SB 5.5.1).
Sattva means my existence. At the present moment my existence is not śuddha, purified. Just like if your health is contaminated, then you get some disease. So for the soul, the living entity, this disease, janma-mṛtyu-jarā-vyādhi-duḥkha-doṣānudarśanam (BG 13.9), this is a kind of disease.
Now, it is a fact because the soul is eternal. Nityaḥ śāśvato 'yaṁ na hanyate hanyamāne śarīre (BG 2.20). The soul is eternal. It does not die. It does not annihilate after destruction of the body, but there is change of body, mṛtyu. Janma-mṛtyu means change of body. Tathā dehāntara-prāptiḥ (BG 2.13). So people should be intelligent to know, "Why I shall undergo this tribulation of repetition of birth and death?" But they do not know it. There is life without birth and death. Tyaktvā dehaṁ punar janma naiti (BG 4.9). After giving up this body, no more taking birth again with this material body. There is a life like that. We get this information. Why should we not fulfill this mission of life in this human form of life? Why unnecessarily desire so many sense gratification? This is called tapasya. If one life we have enjoyed the sense gratification.... Sense gratification, āhāra-nidrā-bhaya-maithunaṁ ca. Eating, sleeping, sex life and protection from fearfulness. Now this has been done in so many lives. Why not in this life make a perfect process so that no more death, no more birth, no more disease, no more old age?
They think it is all utopian. But we don't think. We believe in the words of Kṛṣṇa, words of the śāstra. And we are trying to accept it, practice it and preach it. This is Kṛṣṇa consciousness movement, tapo divyaṁ yena śuddhyet sattvam (SB 5.5.1). Then why we should be interested to purify our existence? Yena brahma-saukhyam anantam. You are after happiness. So this happiness, the temporary happiness, sense gratification, this is not happiness. Sukham ātyantikaṁ yat tad atīndriya-grāhyam (BG 6.21).