From Letters On Yoga

As for immortality, it cannot come if there is attachment to the body, for it is only by living in the immortal part of oneself, which is unidentified with the body, and bringing down its consciousness and force into the cells that it can be done. I speak of course of yogic means. The scientists now hold that it is (theoretically at least) possible to discover physical means by which death can be overcome, but that would mean only a prolongation of the present consciousness in the present body. Unless there is a change of consciousness and change of functionings, it would be a very small gain.

Death is there because the being in the body is not yet developed enough to go on growing in the same body without the need of change, and the body itself is not sufficiently conscious. If the mind and ‘vital’ and the body itself were more conscious and plastic, death would not be necessary.

The Brahman consciousness is sometimes described as a static one, but it has two aspects, static and dynamic, and it is when both are united that it becomes integral. This is the greater consciousness I speak of..., greater than either that which perceives the Brahmic silence and immobility alone, or that which perceives the cosmic existence and action alone. [Sri Aurobindo’s teachings are on Integral Yoga. This Yoga involves integration on all levels, leading to a new being, a Supramental Being. This simply means a being without limitation, one which transcends the barriers of disease, decay and death. This is achieved through a process of evolvement brought about by each one’s own conscious evolution and mastery of their total nature. - Shareall

From an Untitled Document of Sri Aurobindo's Writings

“By becomng conscious, each of us becomes a builder of heaven and a redeemer of the earth. That is why this life on earth takes on such an exceptional significance among all our other forms of life, and also, why the guardians of Falsehood persist on preaching to us the hereafter. We must not waste a minute to do our work here because it is here that we can really do it. Don’t expect anything from death, life is your salvation. It is in life that transformation must be achieved, it is on earth that one progresses, on earth that one realizes. It is in the body that the Victory is won. Then the law of evolution will no longer be made up of opposites forever spurring us to wrest us from our human childishness.

It will be a law of light and endless progress, a new evolution in the joy of Truth. The Victory must only be won once. One glorious body-one body must break the iron law for all bodies. And all men must collaborate to achieve that one Victory. The strategic difficulty of the transformation is fully before us. If earth calls and the Supreme answers, the hour can be even now.