A decision is a commitment to action based on a sound analysis of the facts.
Then there is 'yielding to impulse'. The impulse arises, unbidden, and I yield to it. The tail is wagging the dog. The chemical and electrical brain burps really are running the show.
For a life to be manageable, it must be governed by decisions, in other words commitments to action based on a sound analysis of the facts.
A life governed by chemical and electrical brain burps is definitionally unmanageable.