Stepping into a river, the water laps against the leg of your pants. While it may only be an inch deep, it begins to creep up. The longer you remain in the water, the more it rises, regardless of the shallowness within which you stand.
Similarly, when in a position that we did not plan for, we may be able to endure it for a short while with little negative impact. However, as we allow ourselves to remain in this position, we realize it does not fit us, and we best move on.