The Pharisee's prayer:
God, I thank you that I am not like other men, extortioners, unjust, adulterers, or even like this tax collector. I fast twice a week; I give tithes of all that I get.
The tax collector's prayer:
God, be merciful to me, a sinner.
In each clause of the Pharisee's prayer, the subject is "I." He uses it five times. In the tax collector's prayer, the personal pronoun is used only once and then in the dative case ("to me"). Even in the language, then, it's illustrated that the Pharisee thinks primarily of himself while the tax collector has humility.
There's also a contrast in the length of these prayers. The tax collector's prayer is short and to the point, while the Pharisee (to borrow a description from Matthew 6:7) seems to "think that [he] will be heard for [his] many words."
