Three ways to shorten difficulty
As for the offering of the actions to the Divine and the vital difficulty it raises, it is not possible to avoid the difficulty,—you have to go through and conquer it. For the moment you make this attempt, the vital arises with all its restless imperfections to oppose the change. However, there are three things you can do to alleviate and shorten the difficulty:
I) Detach yourself from this vital-physical—observe it as something not yourself; reject it, refuse your consent to its claims and impulses, but quietly as the witness Purusha whose refusal of sanction must ultimately prevail. This ought not to be difficult for you, if you have already learned to live more and more in the impersonal Self.
II) When you are not in this impersonality, still use your mental will and its power of assent or refusal,—not with a painful struggle, but in the same way, quietly, denying the claims of desire, till these claims by loss of sanction and assent lose their force of return and become more and more faint and external.
III) If you become aware of the Divine above you or in your heart, call for help, for light and power from there to change the vital itself, and at the same time insist upon this vital till it itself learns to pray for the change.
Finally, the difficulty will be reduced to its smallest proportions the moment you can by the sincerity of your aspiration to the Divine and your surrender awaken the psychic being in you (the Purusha in the secret heart) so that it will come forward and remain in front and pour its influence on all the movements of the mind, the vital and the physical consciousness. The work of transformation will still have to be done, but from that moment it will no longer be so hard and painful.
Ref : Letters on Yoga Vol. IV
