All our material existence is a dream. There is no act. Therefore they are temporary. Just like dream is temporary, say for few minutes, or a few hours. Not few hours. Not no dream is for few hours. Because he change while he's in dreaming condition. We change also dreaming features. They also a part dreaming. Similarly the whole material existence is dreaming. Yoga-nidrā. The whole material existence is also generated from the yoga-nidrā of Mahā-viṣṇu. Yoga-nidrā. So we have to consider it that the creation, this material creation is only a dream of the Supreme Lord. Therefore it is not eternal, it is temporary.
Nanu tarhi (Bhāvārtha-dīpikā, 7.7.27). Here it has been, nice example has been given: budhyed gandhair vāyum ivānvayāt (SB 7.7.26) Our contamination of the material world, how it is just like the air passing in different conditions. The air passing through a filthy place, the air becomes filthy smelling. He immediately, "Uhk, some filthy smell is coming. Wherefrom it is coming?" It is due to the air passing through a filthy place it is bearing that filthy smell.
Similarly the air passing through a rose garden, it will carry the flavor of the rose. So if you carry your mind, intelligence and ego through the activities of Kṛṣṇa then your consciousness will be Kṛṣṇa conscious. Your consciousness will change. What is the difficulty to understand how—what is Kṛṣṇa consciousness? Is there any difficulty? If you always remain engaged in Kṛṣṇa's activities, śravaṇaṁ kīrtanaṁ viṣṇoḥ smaraṇaṁ pāda-sevanam (SB 7.5.23).
Hearing, chanting, remembering and worshiping, pāda-sevanam arcanaṁ vandanaṁ dāsyaṁ, offering prayers. When you feel meditative—better chant Hare Kṛṣṇa—loudly. That will save you.