I think you’re missing the concept of “non-linear plan”. Which is normal, most people don’t get it.
When explaining how to make a plan, people say things along the lines of (simplified):
- figure where you are,
- figure where you want to be,
- figure a line from (1) to (2). Ta-da, that’s your plan.
A non-linear plan includes multiple branches, multiple paths. Ideally, all of them will lead to the desired result. For example, let’s say I want to go from my house in Dos Hermanas to my work in Seville. There are three paths which are roughly equivalent in terms of physical length; all begin the same way. I can decide which specific one to take depending on which traffic conditions I perceive, and on the warnings posted by Traffic (highway signs) or listed on the radio. The plan includes three distinct possibilities from the beginning - taking one path or another is not a change of plans, because when I left the house my plan wasn’t “I’ll take this path” but “I’ll take one of these paths”. All three paths were part of the plan.
A non-linear plan could include having people pray for someone. Depending on how many people pray, or how devoutly, or on whether one specific person prays (for example, someone the wounded person has offended greatly and who was still angry at him but considers their well-being more important than his own anger), one thing or another happens - but which things could happen, and how do they come to pass, was predetermined, was part of the plan. Prayer has not changed the plan, it has chosen the path among those which already were part of the plan.