Standing was a normal posture for prayer among the Jews of Jesus" day. It did not in itself reflect the Pharisee"s pride (cf. Matthew 6:5). Even though the Pharisee addressed God in prayer, Jesus noted that he was really talking to himself and reviewing his own self-righteousness. He told God what a superior person he was, using the behavior of others as his standard. He took pride in his supposed superior status and the works that he did that separated him from others. The most pious Pharisees fasted twice a week (cf. Luke 5:33). [1] This Pharisee was also scrupulous about tithing (cf. Luke 11:42). [source][source][source]
"Never, perhaps, were words of thanksgiving spoken in less thankfulness than these. For, thankfulness implies the acknowledgment of a gift; hence, a sense of not having had ourselves What we have received; in other words, then, a sense of our personal need, or humility." [2][source]