There is not a physicist in the world who can perceive when a parlor magician palms off playing-cards.

Play and pray; but on the whole do not pray when you are playing and do not play when you are praying

It is not possible to define. Nothing has ever been finally found out. Because there is nothing final to find out.

Lo, he goeth by me, and I see him not: he passeth on also, but I perceive him not.

When he comes back he has to get used to playing. It's not like he's had a lot of snaps.

Even when you are not playing you are holding me back.