"Vāmanadeva first expanded Himself to the universal form and then reduced Himself to the original Vāmana-rūpa. Thus He acted exactly like Lord Kṛṣṇa, who, at the request of Arjuna, first showed His universal form and later resumed His original form as Kṛṣṇa. The Lord can assume any form He likes, but His original form is that of Kṛṣṇa (kṛṣṇas tu bhagavān svayam). According to the capacity of the devotee, the Lord assumes various forms so that the devotee can handle Him. This is His causeless mercy. When Lord Vāmanadeva resumed His original form, Lord Brahmā and his associates collected various paraphernalia for worship with which to please Him."
The Personality of Godhead (LORD VAMANA DEVA) said: O my dear King, even the entirety of whatever there may be within the three worlds to satisfy one’s senses cannot satisfy a person whose senses are uncontrolled.
The material world is an illusory energy to deviate the living entities from the path of self-realization. Anyone who is in this material world is extremely anxious to get more and more things for sense gratification. Actually, however, the purpose of life is not sense gratification but self-realization. Therefore, those who are too addicted to sense gratification are advised to practice the mystic yoga system, or ashtanga-yoga system, consisting of yama, niyama, asana, pranayama, pratyahara and so on. In this way, one can control the senses. The purpose of controlling the senses is to stop one's implication in the cycle of birth and death.
.... The Krishna consciousness movement is therefore establishing various farms, especially in America, to show how to be happy and content with minimum necessities of life and to save time for self-realization, which one can very easily achieve by chanting the maha-mantra -- Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare. (SB 8.19.21)