Only God can help us to serve him. Joshua the High Priest had no right to be in the presence of the Angel of the Lord dressed in filthy clothes. This was a very serious violation.  But God had mercy on him, as God has mercy on us. 

³ Now Joshua was dressed in filthy clothes as he stood before the angel. ⁴ The angel said to those who were standing before him, “Take off his filthy clothes.”

Then he said to Joshua, “See, I have taken away your sin, and I will put fine garments on you.” (Zechariah 3)

God has something wonderful to reveal to you through his word. Please read Zechariah 3 - 5.

May the Lord richly bless you!