Lord Shiva -and the Bilva patra..

Bilvapatra contains 2% Shiva tatva. By offering bilvapatra to the Shivpindi on Mahashivratri, the manifest Shiva tatva near the stalk of the bilvapatra gets activated. Due to this, waves of chaitanya as well as Shiva tatva are emitted by the bilvapatra. 

The bilvapatra attracts 20% of the Shiva tatva present in the Shivpindi towards itself. By immersing this bilvapatra in water or by placing it in grains, the Shiva tatva present in the bilvapatra is transmitted to them. 

The Shiva tatva in the bilvapatra is activated to a larger extent on Mondays when it transmits 10% of the Shiva tatva and sattvikta. On other days only 1% of the Shiva tatva is activated in the bilvapatra.

Bilvarchan

Offering bilvapatra to the Shivpindi and chanting the mantra 'Om Namah Shivaya' with each offering is known as bilvarchan. Continue offering the bilvapatra until the pindi is completely covered. 

Offer the bilvapatra from the lower part of the pindi. By starting from the feet of the idol, more benefit is derived and the idol can be covered completely.