I am currently changing out my water pump shaft, all going well, but looking at the water pump shaft bearings I do not understand how they get lubricated. The two bearings are set up with the seals on the outside of each bearing

, circlip in the middle, I dont understand how they get oil. The seals would tend to keep oil out of the bearings?? Or at least the seal on the inner bearing would.
What am I missing?