You often need both, but you can't have both at the same time. I have been stuck here far too often. Trying to remember my "VISION" while I work on my daily responsibilities has led me to burn out far too often.
Here is how I broke the chain:
Dedicate time every day (best in the AM) to review your vision. You have this time to ponder, review, and believe. The rest of you day can be FOCUSED on the important tasks and responsibilities that will ultimately have your undivided attention.
Multitasking is a lie.