Cleanliness is essential for making advancement in spiritual life. There are two kinds of cleanliness: external and internal. External cleanliness means taking a bath, but for internal cleanliness one has to think of Krishna always and chant Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare. This process cleans the accumulated dust of past karma from the mind.
Bhagavad Gita 13.8-12,
Happiness derived from a combination of the senses and the sense objects is always a cause of distress and should be avoided by all means.
Bhagavad Gita 18.38,
The mystics derive unlimited transcendental pleasures from the Absolute Truth, and therefore the Supreme Absolute Truth, the Personality of Godhead, is also known as Rama.
Bhagavad Gita 5.22,
The best means of spiritual realization is chanting the holy name of the Lord.
Bhagavad Gita 6.11-12,
Those who have entered into a transcendental relationship with Krishna relish at every step the descriptions of the pastimes of the Lord.
Bhagavad Gita 10.18,
The Bhagavad-gita can be consulted in all critical times, not only for solace from all kinds of mental agonies, but also for the way out of great entanglements which may embarrass one in some critical hour.
Srimad Bhagavatam 1.15.27,