Why is it that the mind that has found God still retains or constantly reverts to the feeling of not having found Him? Why does His absence weigh on us even in the presence itself, however intimate it may be? Why face to face with Him who penetrates all things, why that insurmountable obstacle, that unbridgeable gap? Why always a wall or a gaping void? Why do all things, as soon as they have shown Him to us, betray us by concealing Him again? -henri de lubac