According to the passages we read, it is possible for a good man to have his steps order by the Lord while at the same time his foot slips and he falls. But the difference between a good man versus and evil one is that he never stays down. An evil man, on the hand, never repents. He continues the same course.
Abrasion is defined as the erosion that occurs when particles scrape against each other. The enormous weight of the glacier, along with rocks and sediment plucked up and clinging to its belly scratch and carve the rock surface below. It's almost as if the moving glacier is sanding the rocks with abrasive sandpaper.
Wind can also bounce material along the surface, analogous to bed load in streams, causing abrasion. Wind abrasion is nature's version of sandblasting. It produces smooth surfaces related to the wind direction and is most effective close to the ground. Next time you drive outside of Las Vegas, look at the telephone poles. They have sheet metal wrapped around their bases to protect against destruction by wind abrasion.