Transforming Experiences and Appearances
Tantrayana instructs how to transform impure experiences and appearances.
One needs to know that this doesn't mean one merely believes or thinks
everything is pure. Purity is not a belief or an idea. In order to realize
purity, one needs to receive blessings, attain accomplishments, and engage
in beneficial activities. So, it is of utmost importance to base one's
practice on the Three Roots when one wants to practice Vajrayana.
– Jamgon Kongtrul Rinpoche the Third, from The Three Roots, 1987.