The meaning of the Greek text of this phrase is not clear. Possible meanings are 1) "The Pharisee stood and prayed about himself in this way" or 2) "The Pharisee stood by himself and prayed."
The Pharisees believed that tax collectors were as sinful as robbers, unrighteous people, and adulterers. This could be made explicit. AT: "and I am certainly not like this sinful tax collector who cheats people!" (See: [[rc://en/ta/man/translate/figs-explicit]])