Just as the same city viewed from different directions appears entirely different.. there are, as it were, just as many different universes, which ar… - Gottfried Wilhelm Leibniz

Moreover, it must be confessed that perception and that which depends upon it are inexplicable on mechanical grounds, that is to say, by means of figures and motions. And supposing there were a machine, so constructed as to think, feel, and have perception, it might be conceived as increased in size, while keeping the same proportions, so that one might go into it as into a mill. That being so, we should, on examining its interior, find only parts which work one upon another, and never anything by which to explain a perception. Thus it is in a simple substance, and not in a compound or in a machine, that perception must be sought for.

He who hasn't tasted bitter things hasn't earned sweet things.

And as every present state of a simple substance is naturally a consequence of its preceding state, so its present is pregnant with its future.