If you find yourself resting in the Garden of God and you want to split an unsplittable stone, then persevere - keep moving forward - and don't grow tired of moving forward. The outcome will astonish you every time, and you'll be eager to share what you've accomplished.
How amazing the kindness and honesty of God in all these things. God required my forward movement and not my worry; and the same effort in movement is required for the upbuilding of the Garden and the salvation of our race. But at the moment, I'm completely exhausted.
Aim higher, aim for the perfect outcome. There's no need to settle for "good enough" because of fear, worry, or exhaustion.
Sometimes you'll feel like you're taking a 10-mile uphill walk on the edge of a cliff a thousand feet in the air; you'll feel it all in your stomach, and that's OK. Just keep walking, you won't be destroyed nor will you destroy.
Not entirely true. You might destroy (incidentally) in order to further repair; and you might be destroyed in order to be further saved according to a Higher standard. None of these things are in your control - thankfully.
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You made your decision, and you could only ever make the decision you made. Free will... does God even have free will? I don't know. I suppose if God is able to un-change all that changes in the universe.
As for you, if you lived the same life a thousand times, with the all things being as they are - environment, culture, coin flips and all - you'd make the exact same decision a thousand times. So you can only move forward or stay in one place.
"What if" was always an impossibility for you. I've found it best to accept my position, where I am, and move forward.