Varahapurana (A sacred text of Sanskrit)says that the devotee shall be very clean while worshipping the idol of the deity . The devotees shall throw away neither hair nor nails around the premises of the temple. If he does, he will become fly after his death. Not only that, but also he will enter the dreadful nether land in which he will be subject to rigorous punishment.
The person who throws betel leaves inside the temple will fall in Hades posthumously and faces great atrocities there till the cosmic end. His hardships will not end there itself. He will born thrice assuming shape of dog!
If any person spits inside the temple, he will slip into the ocean of filthy hell in which he will be bitten by flies. If a person passes urine in or around the grounds of temple he will fell upside down on a hell indisputably which is filled with urine. More horrible is the plight that shall be imposed upon the person who discharges excreta around or inside the temple. He will punished in all twenty one hells .At the end of that much he will born as an insect inside excreta.
Always Dharmashastras(Treatises on religious conduct ) stress upon cleanliness.
In most of the cases the temples in India are not clean, sans some exceptions. Ones I went to famous Govindaraja temple, Tirupati. After prostrating , I was very happy to have Prasadam(the holy offering ). But my happiness was short-lived .Because some devotees were rubbing their palms on the surface of a pillar after they ate Prasadam. There were so many taps near by . Even at the Balaji temple of Tirumalai I have observed this practice, Why these devotees do not follow the Shastras (holy scriptures), I wonder.
Nobody cares for traditional style of threatening of getting sunk in hell . But when the idol worship is performed according to Shastras why we are not bothering about the dirtiness strongly opposed in the same works?
This is very common sight that coconut shells are thrown in a careless manner inside the temples. Throwing skins of vegetables is also bane of the temples which are very well known for their sanctity. It is duty of the concerned authorities to vigil very strictly inside the premises of temples.
The shastras clearly and unambiguously upheld the importance of flawlessness of the body of devotees. Worship without bathe is a sin, these treatises proclaim.
According to Agamas(treatises written in Sanskrit on temple rituals) it is sin of worshipping God with unclean hands. While worshipping the God with flowers , devotee has to know whether the flowers are from market . If the answer is yes he shall desist from worship as the flower bought from market is considered unholy according to the shastras. Only the flowers from his own garden are suitable oblation. Being such a case it is very depressing to observe in some areas of the towns that some devotees actually steel the flowers from the garden of others and worship the idols! This obnoxious practice is an indicator of cerebral abnormality.
If devotee does not concern about his family members and only concerns God, he is not a paradigm. He shall show due respect to the devotees first and God next. God does not accept the worship done ignoring or insulting the devotees. Shivananda of divine life society used to advice his disciples that service of the mankind is best means to purify the mind. Purification of mind is a must in order to practice meditation. Shankaracharya, the famous advocator of non-dualism was of the opinion that the religious duties are helpful to discard the defilement of mind. Obviously, the religious duties were meant for pleasing of Gods. Since now-a-days pleasing of the human beings is more important, one can substitute human duties in the place of the religious duties.
But that does not mean only working culture is sufficient in order to achieve spiritual goal. If it had so all the human beings would have become spiritual giants !
God always watches and scrutinizes his devotee. If he swerves from the path of righteousness God clearly indicates the same by various incidents so that devotee can correct himself. God relishes the oblations dedicated to him by the devotee who is physically and mentally pure. In order to discard the mental pollution devotee shall practice meditation. Some devotees or of the opinion that devotion means some kind of sentimentality towards God, temples and holy places. Shastras do not accept this view. The word devotion is a process in which there is wholehearted study of the shastras and performing religious practices with having knowledge of their correct significance.
Devotion is a state of mental stability or focus on single point . Strictly speaking, even the so-called meditation is nothing but constant craving for God. Devotion is outward meditation and meditation is inward devotion.
In the technique called catharsis the striver throws up his inner emotions like detestation, undue adore etc.. forcibly. Then his mind will be tranquil. Since unruffled outlook is an important asset for meditation, the striver can ascend the spiritual peak with ease.
Our body itself is a temple in which the Lord lives . If we have to perceive Him the body and mind shall be pure. Reflection is not behold clearly in disturbed water. The presence of God is not experienced in fluctuating mind. Likewise, even inside of a temple cannot provide us divine serenity if there is distraction like dirt.
Now a days the word pollution is in news everywhere. But physical pollution and mental pollution that are depicted in the shastras are neglected in spiritual circles. Shastras say that the oblation dedicated to God by a striver with mental adulteration can not be acceptable to the Omniscient. The better mindset, the brighter inner luminosity .This is the etiquette seen in treatises for devotees.