The result of these changes will be to make the body a perfect instrument of the spirit. The spiritual force will be able to do what it wills and as it wills in and through the body. It will be able to conduct an unlimited action of the mind or at a higher stage of the supermind without the body betraying the action by fatigue, incapacity, inaptitude or falsification. It will be able too to pour a full tide of the life-force into the body and conduct a large action and joy of the perfected vital being without that quarrel and disparity which is the relation of the normal life-instincts and life-impulses to the insufficient physical instrument they are obliged to use. And it will also be able to conduct a full action of the spiritualised psychic being not falsified, degraded or in any way marred by the lower instincts of the body and to use physical action and expression as a free notation of the higher psychical life. And in the body itself there will be a presence of a greatness of sustaining force, an abounding strength, energy and puissance of outgoing and managing force, a lightness, swiftness and adaptability of the nervous and physical being, a holding and responsive power in the whole physical machine and its driving springs [mahattva, bala, laghuta, dharana-samarthya] of which it is now even at its strongest and best incapable.
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सिद्धयसिद्धयोर्निर्विकार: कर्ता सात्त्विक उच्यते ॥१८.२६॥
Freed from attachment, non-egoistic, endowed with courage and enthusiasm and unperturbed by success or failure, the worker is known as a pure (Sattvika) one. Four outstanding and essential qualities of a worker. - Bhagwad Gita : XVIII-26