The example I have several times repeated: just like you put an iron rod in the fire. It becomes warm, warmer, and gradually it becomes red hot. When it is red hot, it is transformed into the nature of fire. It is no longer iron. Similarly, if you constantly remain in Kṛṣṇa consciousness, you at once transfer yourself to the higher nature of Kṛṣṇa, and that is your liberation. And if we can die in higher nature, then this formula, tyaktvā dehaṁ punar janma naiti... (BG 4.9). oh, he does not come back again to this material world. So we shall have to try, we shall have to practice this Kṛṣṇa consciousness in such a way, that we shall permanently exist in higher nature. And if we can die in that higher nature, then our place in the transcendental world is reserved. That is the whole thing.
In India there is a common saying. They say, bhajan koro pūjān koro morte janle haya. The meaning is that however you may meditate upon... You may be very great meditator, or you may be a great religionist or yogi or a very learned scholar or whatever you may be, but everything will be tested at the time of your death. How far you have made progress, that will be tested at the time of your death. That is also explained in the Bhagavad-gītā. Yaṁ yaṁ vāpi smaran loke tyajaty ante kalevaram (BG 8.6). Ante. Ante means at the end. Because this body is sure to end. Antavanta ime dehāḥ. This body is antavat; it is destined to be ended. "As sure as death." But nityasyoktāḥ śarīriṇaḥ. Śarīriṇaḥ means the spirit spark which is occupying this body. That is nitya; that is eternal.