So as far as he will know, he will awake the next instant after death. This period of time, referred to as the naked state by Paul, is quite often spoken of as a sleep in the Bible. However in the original languages, the word sleep is used only of those who are believers and hope to awake. You can check this with the lexicon in the back of Strong's Concordance. Let us see what Job has to say about this period of time.
Man lies down.
That is death. It is unfortunate that this is translated sleep in many places spoiling the difference maintained as mentioned above. Man does not rise up or awake until a certain time. That time, in the Hebrew is described as when the heavens become un-stitched. There is no statement that all will rise, awake, or be raised out of sleep.