Tapasya is a strong concentration of the energies for a result - but usually concentration of them in the practice of some discipline for a spiritual result.
Sri Aurobindo
Tapasya is the concentration of the will to get the results of sadhana and to conquer the lower nature.
Sri Aurobindo, Letters on Yoga - II: The Central Processes of the Sadhana
When the will and energy are concentrated and used to control the mind, vital and physical and change them or to bring down the higher consciousness or for any other Yogic purpose or high purpose, that is called Tapasya.
Sri Aurobindo, Letters on Yoga - II: Surrender
Tapasya
A discipline with the aim of realising the Divine.
White, green
Mental Tapasya
The process leading to the goal.
Yellow, green
Vital Tapasya
The vital undergoes a rigorous discipline in order to transform itself.
Violet, green
Integral Tapasya
The whole being lives only to know and serve the Divine.
White, green
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