I feel the spirit of Extreme Practices is beautifully expressed in the following verse.
Of course we should, with apologies to the poet, reword the last three lines, before it can become an anthem for extreme practices.
" Where the mind is without fear and the head is held high
Where knowledge is free
Where the world has not been broken up into fragments
By narrow domestic walls
Where words come out from the depth of truth
Where tireless striving stretches its arms towards perfection
Where the clear stream of reason has not lost its way
Into the dreary desert sand of dead habit
Where the mind is led forward by thee
Into ever-widening thought and action
Into that heaven of freedom, my father, let my country awake.
"
--Rabindranath Tagore (1861 - 1941) Nobel Prize for Literature (1913)
The above verse is from Tagore's collection "Gitanjali" (1912), Translated from Bengali to English by W B Yeats.
National anthems of two countries (India and Bangladesh) are works of Tagore.