Any devotee coming into the temple should always offer something to the Deity—fruit, flowers, incense, etc. If one cannot offer anything in cash, something else must be offered. In India the system is that all the ladies and gentlemen who come in the morning to visit the temple bring so many things. Even one morsel of rice or one morsel of flour can be offered. It is a regulative principle that one should not go to see a saintly person or the Deity in the temple without any offering. The offering may be very humble, or it may be priceless. Even a flower, a little fruit, a little water—whatever is possible—must be offered. So when a devotee comes to offer something to the Deity in the morning, he is sure to smell the good flavor of the incense, and then at once he will become cleansed of the poisonous effect of material existence.
It is stated in the Tantra-śāstra: "If the smell of the garland which was offered to the Deity in the temple enters into the nostril of a person, immediately his bondage to sinful activities becomes cleared. And even if one has no sinful activities, still, by smelling such remnants of flowers, one can advance from māyāvādī (impersonalist) to devotee." There are several instances of this, a prime one being the advancement of the four Kumāras. They were impersonalist māyāvādīs, but after smelling the remnants of flowers and incense in the temple, they turned to become devotees. From the above verse it appears that the māyāvādīs or impersonalists are more or less contaminated. They are not pure.
It is confirmed in the Śrīmad-Bhāgavatam: "One who has not washed off all reactions of sinful activities cannot be a pure devotee. A pure devotee has no more doubts about the supremacy of the Personality of Godhead, and thus he engages himself in Kṛṣṇa consciousness and devotional service." A similar statement is in the Agastya-saṁhitā: Just to purify the impurities of our nostrils, we should try to smell the remnants of flowers offered to Kṛṣṇa in the temple.
Touching the Deity
In the Viṣṇu-dharmottara there is a statement about touching the lotus feet of the Lord. It is said: "Only a person who is initiated as a Vaiṣṇava and is executing devotional service in Kṛṣṇa consciousness has the right to touch the body of the Deity." In India there was agitation during Gandhi's political movement because the lowborn classes of men like street-sweepers and caṇḍālas are prohibited, according to the Vedic system, from entering the temple. Due to their unclean habits they are prohibited, but at the same time they are given other facilities so they may be elevated to the highest grade of devotional service by association with pure devotees. A man born in any family is not barred, but he must be cleansed. That cleansing process must be adopted. Gandhi wanted to make them clean simply by stamping them with a fictitious name, Hari-jana (children of God), and so there was a great tug of war between the temple owners and Gandhi's followers.