The Deity worship is there just to give chance to the devotee satatam, satata-yuktānām—always engaged in Kṛṣṇa's service. From early morning, half past three, four, up to night, ten, they are engaged. That is called satata-yuktānām. Only a few hours given to them for taking rest because, after all, we have got this material body; it requires little rest. Otherwise there is no question of resting. Twenty-four hours engaged in the service of Kṛṣṇa.
So that is possible as you become advanced. Just like the six Gosvāmīs. They attained that stage. They were not sleeping at night. Giving service. It is said, nānā-śāstra-vicāraṇaika-nipuṇau sad-dharma-saṁsthāpakau lokānāṁ hita-kāriṇau (Ṣaḍ-gosvāmy-aṣṭaka 2). Nidrāhāra-vijitau. This is spiritual life: the more you conquer over the necessities of this body. The our necessities, the created necessities, they are necessities of the body. The body requires to eat. The body requires rest. The body requires sex. The body requires defense. But the soul does not require. So more you become advanced in spiritual consciousness, the material necessities become minimum.
Nidrāhāra-vihārakādi-vijitau (Ṣaḍ-gosvāmy-aṣṭaka 6). That is possible; that is not story. There are many instances, and the more you become advanced in Kṛṣṇa consciousness, spiritual life, these necessities of life, necessities of body . . . Because body is different from the spirit soul. The necessities of the body is material, and the necessities of the soul is spiritual. But unfortunately, although the spirit is there, we are so much absorbed in material consciousness we do not understand what is spirit soul. We are simply busy in taking care of the body. So this is not very good condition. This is material condition. And it is very risky if we simply . . . Simply to take care of the body means creating different desires: "I shall be happy in this way. I shall be happy in this way." So nature's mercy is that as soon as you think that you will enjoy life like this, she will give you good opportunity. That means changing a body wherein you can enjoy the material facilities very easily.