We humans are just dirty. Dirty like mud, sand, soil. Coz that's what we made of. We not made of white innocent snow, or blue cool water, or hot flaming fire. Coz we are human.
Sinful. We are all sinners.
That's why we pray. We istighfar. To clean ourselves. Again and again. To purify ourselves.
And then get dirty again.
And then we clean and purify again.
Until we no longer do that, when we 'there'.