Arthur, do you know that tomorrow would be different? HG Wells himself had chosen to propel us in 800 000 AD ... little risk that a reader comes to tickle him the pen. But you, MC Clarke, you stillsuits your mystical-magical mark on us, where others can barely glimpse the beginning of a suspicion of grace. You, you found and exposed to the grand day. Thank you for these pages on the borders of conceivable: the doorpost of our reasons staggers and, with it, it is also our whole worldview that wobbles. We also learn in this way.