The more we are happy in Krishna Consciousness the more we become purified.
Actual joy is a product of the spiritual nature. It spontaneously manifests when the living entity begins to love God.
For a person who has suitable shoes on his feet, there is no danger even when he walks on pebbles and thorns. Similarly, for one who is always self-satisfied there is no distress. Indeed, He experiences happiness everywhere.
Through the popularizing of hari-kirtana, or the sankirtana movement, the brahminical culture and ksatriya government will automatically come back, and people will be extremely happy.
Purport on Srimad Bhagavatam 7.2.11
Simply by chanting the holy name of Krishna – Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare – a devotee of the Lord can approach the supreme destination easily and happily, but this destination cannot be approached by any other process of religion.
Purport on Bhagavad Gita 12.6