You cannot execute any severe type of religious principles. Simply take to this chanting of Hare Kṛṣṇa mantra. Paraṁ vijayate śrī-kṛṣṇa-saṅkīrtanam (CC Antya 20.12). You'll come out triumphant. But actually, on principle, dharma means gradually, step forward for liberation. Dharmasya hy āpavargyasya na arthāya (SB 1.2.9). We should not execute dharma for some material gain, arthāya. Just like people are very busy to give in charity, because he'll get some exalted post. Yajña dāna tapa kriyā. These are karma-kāṇḍīyas, yajña, performing sacrifices, giving in charity, dāna, tapa, austerity. Just like Hiraṇyakaśipu underwent severe austerity; Rāvaṇa underwent severe austerity. What for? For material gain. That's all.
So actually dharma does not mean that. Dharma means to come to the point to the Supreme Personality of Godhead. When He says, sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja (BG 18.66), this is dharma, real dharma. Dharmaṁ tu sākṣād bhagavat-praṇītam (SB 6.3.19). Sākṣād Bhagavān, Kṛṣṇa, is ordering like that. That is dharma. Na arthāya. Not for material gain. People generally execute religious principles for some material gain. That is warning. Bhāgavata is warning, na arthāya upakalpate: don't execute religious performances simply for material gain.