This much is certain: there was a time when the matter of our island universe had transformed into heat such an amount of motion – of what kind we do not yet know – that there could be developed from it the solar systems appertaining to (according to Mädler) at least twenty million stars, the gradual extinction of which is likewise certain. How did this transformation take place? We know just as little as Father Secchi knows whether the future caput mortuum of our solar system will once again be converted into the raw material of new solar systems. But here either we must have recourse to a creator, or we are forced to the conclusion that the incandescent raw material for the solar systems of our universe was produced in a natural way by transformations of motion which are by nature inherent in moving matter, and the conditions for which, therefore, must also be reproduced by matter, even if only after millions and millions of years and more or less by chance, but with the necessity that is also inherent in chance.
Friedrich Engels, Dialectics of Nature, Progress Publishers, Moscow, 1976, 37-38