Sri Aurobindo
Letters of Sri Aurobindo
Volume I - Part 5
I have not said [in the preceding letter] that everything is rigidly predetermined. Play of forces does not mean that. What I said was that behind visible events in the world there is always amass of invisible forces at work unknown to the outward minds of men and by Yoga (by going inward and establishing a conscious connection with the cosmic Self and Force and forces) one can become conscious of these forces, intervene consciously in the play, to some extent at least determine things in the result of the play. All that has nothing to do with predetermination. On the 
contrary one watches how things develop and gives a push here and a push there when possible or when needed. There is nothing in all that to contradict the dictum of the great scientist Sir C.V. Raman. Raman said once that all these scientific discoveries are only games of chance. Only, when he says these things are games of chance, he is merely saying that human beings don’t know how it works out. It is not a rigid predetermination, but it is not a blind inconscient Chance either. It is a play in which there is a working out of possibilities in Time.