What if you were told a thing one day and you believed it one day, and next day you doubted and did not believe it any more? If you were told that there is a house in the sixth heaven and a palace in the seventh, what would that do for you? It would only answer your curiosity; it would take you nowhere. It is therefore by the way of meditation that we attain to this: that we can erase from the memory what we wish to. In this way we are able to make our heaven ourselves.