In the previous verse Śukadeva Gosvāmī gave the example that "The dried leaves of creepers beneath a bamboo tree may be completely burned to ashes by a fire, although the creepers may sprout again because the root is still within the ground." You have seen practically. On the field the grass is dried up, and sometimes fire is set and it becomes all burned into ashes. But as soon as there is rainy season, again they sprout and become green. The idea is that you may perform the religious, ritualistic ceremonies, but if your heart is not cleansed, simply by performing these ritualistic ceremonies you'll not be purified. So we have got two desires: pious desire or impious desires. So either you become desirous of doing pious thing or you desirous of doing impious things, the sufferings of this material world will continue.
It is said in the Bhagavad-gītā,
- ūrdhvaṁ gacchanti sattva-sthā
- madhye tiṣṭhanti rājasāḥ
- jaghanya-guṇa-vṛtti-sthā
- adho gacchanti tāmasāḥ
- (BG 14.18)
So by pious activities you can be elevated to the higher planetary system in the heavenly planet, but that does not mean completion of your suffering of the material world.