It can be very hard to do. Especially if there is grass and it is wet. Or if it has a lot of loose rocks. Your feet will keep sliding out from under you. And because you are on the side of a hill, you lose your balance very easily.
Some people learn to live on the side of a hill.
They learn to walk without always losing their balance. But eventually they will even lose their balance and fall. Or one day their feet will slide out from under them without warning. They may fall to their death. Our spiritual life is this way.