Holi is not merely a festival of burning a heap of dung cakes and wood. Rather it is a pious day for removing one's psychological weakness and burning the evil desires.
From this day, we should throw out our evil desires and cultivate in our life the divine virtues of love for God, goodwill, sympathy, faith in the chosen Divinity, fearlessness, steadfast adherence to Dharma, etc.
We should invoke in our lives the virtues of the great devotee - Prahlada, viz. a firm belief in God, tolerance, forgiveness, love for the Lord, compassion, benevolence, non-violence, etc.
The colours applied on Holi, colour not only the body. You should colour your heart with the Divine love. Holi is the festival of nature; it is the celebration of spring; it is a pious observance of the tradition of offering newly harvested grains to the Lord before using the same. One should stop taking dates from this day onwards.
Holi is the festival of burning down our vices, addictions and evil tendencies and of imbibing virtues. Holi is a life giving wonder drug that rejuvenates our sadhana. It spreads the message of love in the society. Take constant care not to insult, slander or harm anybody by your impertinence or arrogance. Guard against circumstances that tend to colour you with poisonous hues of addictions. You should rather colour yourself only with colour of devotion to Lord........of Self bliss, in which Lord and His beloved saints abide......and colour yourself so firm that the colour should never fades away.
In ancient times, students going to Gurukuls for education (a place where a guru instructed his disciples) were given a stick of Palash to carry with them, as the Palash wood helps in bestowing mental equipoise. Holikotsava is indeed the festival of availing this quality of palash through its flowers and of rejoicing in the blissful atmosphere created by chanting of the Lord's pious name! Celebration of Holi in this Vedic manner protects the health. In our culture, the Holi festival has been celebrated since time immemorial. It is not that this festival is celebrated only in India. Holi, an invaluable gift of Indian culture, is celebrated in many countries of the world, though by different names. Some whimsical people have started celebrating this pious health-giving festival in a distorted manner and the society, in general, has started blindly following them. The balance of the seven vital constituent elements (saptadhatu) and the seven colours (saptarang) of the body are disturbed by the chemical colours and the severe Sunrays. This imbalance results in mental dejection, skin diseases and eye disorders. One develops an irritable nature. To avert such ill-effects, people in olden times used to play Holi with Eco-friendly colours prepared from palash flowers. The palash flowers have been found to possess characteristics that correct the imbalance of the Saptadhatus and the Saptarangs. The true sadhaks should follow the Vedic way of Celebrating Holi."
It is very harmful to play Holi with poisonous chemical colours. It is beneficial to play Holi with colours prepared from Palash flowers. This keeps the seven colours and dhatus of the body in equilibrium, protects the skin and increase the body's resistive power against heat.