Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 3
Fragment ID: 14437
The greater difficulty [in freeing oneself from vital desire] is because the sadhana is now taking place directly on the physical plane, where the force of a habit or habitual movement once formed is very great. When the sadhana is taking place on the mental or vital plane, it is more easy to control or change, because the mind and vital are more plastic than the physical. But on the other hand if something is definitely gained on the physical plane, there is a more lasting and complete fulfilment than when it is on the mental or vital alone.