"With Royal Garments"
Degel Machaneh Ephraim, Drash L'Purim:
ומרדכי יצא מלפני המלך בלבוש מלכות
"And Mordecai left the king's presence with royal garments..." (Esther 8:15)
A person standing in prayer who forgets Hashem's presence cannot be considered as if he is standing before the King. Mordechai, however, was a tzaddik and when the Megillah says that he left the king's presence, it notes that he was wearing the royal garments; the garments that were a constant reminder of the King.
דורש טוב לעמו ודובר שלום לכל זרעו
Mordechai judged the Jewish people favorably. He constantly sought out and found the good that was within them and spoke to them in a peaceful manner.