Sri Aurobindo
Letters of Sri Aurobindo
8. Rebirth
You must avoid a common popular blunder about reincarnation. The popular idea is that Titus Balbus is reborn again as John Smith, a man with the same personality, character, attainments as he had in his former life with the sole difference that he wears coat and trousers instead of a toga and speaks in cockney English instead of popular Latin. That is not the case. What would be the earthly use of repeating the same personality or character a million times from the beginning of time till its end? The soul comes into birth for experience, for growth, for evolution till it can bring the Divine into Matter. It is the central being that incarnates, not the outer personality – the personality is simply a mould that it creates for its figures of experience in that one life. In another birth it will create for itself a different personality, different capacities, a different life and career. Supposing Virgil is born again, he may take up poetry in one or two other lives, but he will certainly not write an epic but rather perhaps slight but elegant and beautiful lyrics such as he wanted to write, but did not succeed, in Rome. In another birth he is likely to be no poet at all, but a philosopher and a yogin seeking to attain and to express the highest truth – for that too was an unrealised trend of his consciousness in that life. Perhaps before he had been a warrior or ruler doing deeds like Aeneas or Augustus before he sang them. And so on – on this side or that the central being develops a new character, a new personality, grows, develops, passes through all kinds of terrestrial experience.
As the evolving being develops still more and becomes more rich and complex, it accumulates its personalities, as it were. Sometimes they stand behind the active elements, throwing in some colour, some trait, some capacity here and there,– or they stand in front and there is a multiple personality, a many-sided character or a many-sided, sometimes what looks like a universal 
capacity. But if a former personality, a former capacity is brought fully forward, it will not be to repeat what was already done, but to cast the same capacity into new forms and new shapes and fuse it into a new harmony of the being which will not be a reproduction of what was before. Thus you must not expect to be what the warrior and the poet were. Something of the outer characteristics may reappear but very much changed and new-cast in a new combination. It is in a new direction that the energies will be guided to do what was not done before.
Another thing. It is not the personality, the character that is of the first importance in rebirth – it is the psychic being who stands behind the evolution of the nature and evolves with it. The psychic when it departs from the body, shedding even the mental and vital on its way to its resting place, carries with it the heart of its experiences,– not the physical events, not the vital movements, not the mental buildings, not the capacities or characters, but something essential that it gathered from them, what might be called the divine element for the sake of which the rest existed. That is the permanent addition, it is that that helps in the growth towards the Divine. That is why there is usually no memory of the outward events and circumstances of past lives – for this memory there must be a strong development towards unbroken continuance of the mind, the vital, even the subtle physical; for though it all remains in a kind of seed memory, it does not ordinarily emerge. What was the divine element in the magnanimity of the warrior, that which expressed itself in his loyalty, nobility, high courage, what was the divine element behind the harmonious mentality and generous vitality of the poet and expressed itself in them, that remains and in a new harmony of character may find a new expression or, if the life is turned towards the Divine, be taken up as powers for the realisation or for the work that has to be done for the Divine.