The characteristic law of Spirit is self-existent perfection and immutable infinity. It possesses always and in its own right the immortality which is the aim of Life and the perfection which is the goal of Mind.<ref>http://incarnateword.in/cwsa/23/the-threefold-life#p7</ref>
As you pursue this labour of purification and unification, you must at the same time take great care to perfect the external and instrumental part of your being.<ref>http://incarnateword.in/cwm/12/the-science-of-living#p6</ref>
One can attain perfection in the different parts of the being - in the mind, the vital and the physical.
When the higher truth manifests, it must find in you a mind that is supple and rich enough to be able to give the idea that seeks to express itself a form of thought which preserves its force and clarity. <ref>http://incarnateword.in/cwm/12/the-science-of-living#p6</ref>
Our mind, in its search for what must be, turns towards a concentration on our own inner spiritual growth and perfection, on our own individual being and inner living; or it turns towards a concentration on an individual development of our surface nature, on the perfection of our thought and outer dynamic or practical action on the world, on some idealism of our personal relation with the world around us; or it turns rather towards a concentration on the outer world itself, on making it better, more suited to our ideas and temperament or to our conception of what should be. <ref>http://incarnateword.in/cwsa/22/the-divine-life#p7</ref>
'''Perfection of the Vital'''
not, therefore, the truth of the Silence to say that it is in its nature a rejection of the cosmic activity.
The calm established in the whole being must remain the same whatever happens, in health and disease, in pleasure and in pain, even in the strongest physical pain, in good fortune and misfortune, our own or that of those we love, in success and failure, honour and insult, praise and blame, justice done to us or injustice, everything that ordinarily affects the mind.
Another important aspect is Faith. There is one kind of faith demanded as indispensable by the integral Yoga and that may be described as faith in God and the Shakti, faith in the presence and power of the Divine in us and the world, a faith that all in the world is the working of one divine Shakti. <ref>http://incarnateword.in/cwsa/24/faith-and-shakti?search=perfection</ref>
=Difficulties in Perfection=
The ego-sense is contrary to spiritual realisation, so how can any kind of ego be a thing to be encouraged? As for the magnified ego, it is one of the most perilous obstacles to release and perfection. There should be no big I, not even a small one. <ref>http://incarnateword.in/cwsa/31/ego-and-its-forms#p54</ref>
The difficulty that the mind cannot wholly mentalise life and matter; there are considerable parts of the life being and the body which remain in the realm of the submental and the subconscient or inconscient. This is one serious obstacle to the mind's endeavour towards the perfection of the nature.<ref>http://incarnateword.in/cwsa/22/the-ascent-towards-supermind#p16</ref> The mind in ignorance is the main difficulty on the path of perfection.