None of the above choices .It means looking up in your mind 's eye the letters in the word nothing .It means letting your mind wander and not focusing on anything with a sort of goal or earnestness .It means practicing tantric yoga .
what is meant by " thinking about nothing " ?
You ca n't be thinking about nothing . " " Well yeah , but I ' m not thinking of anything important . " " If it 's not important then tell me .