A mind without focus is barely a mind. To have one’s thoughts jump to and fro without purpose is not even to exist. It is the worst way for time to pass. Despite that, we still find our mind succumbing to that condition, and there seems to be little one can do to escape it, except, like a fever, to wait.
Wandering is at least a purpose-driven lack of focus. It is for enjoyment, mental ease, exploration, and play. Those are useful. But there are different qualities of wandering. Wandering is good when we are alert, curious, reflective, and/or inquisitive. It is the sort of wander that inspires wonder. But sometimes we wander because we are distracted, bored, anxious, tired, sick, or frustrated. That sort of wander doesn’t inspire wonder. I find myself in the second type more often than I would like.
Natural Causes 