Peter liked to hike around in the woods, especially with his father, who could explain so many things they saw. So they both went out for another hike, only this time the whole area was muddy because it had rained during the night. But they were prepared: they wore their rubber boots. As they trudged along, more and more mud caked onto their boots so that their feet looked like two big blobs of mud. After a bit, Peter was forced to stop. “I can’t go any farther,” he said, “My feet are too heavy.” “No wonder,” his father said. “Your rubber boots are caked with mud; we can’t go on like this. We’ll have to get that mud off our boots.” So at the next little stream Peter washed the caked clay off his boots, then walking became easier again.
It is the same with our spiritual life too. As we trudge along it is almost inevitable that we become dirty. We need to cleanse our soul at least every now and then.