Halfsies.

“The mind of man plans his way…”
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Robert Burn’s 1786 poem, To a Mouse, only handled half of the thought correctly, and in that half it is arguable if “correctly” is even the proper word. His “…best laid schemes o' mice an' men, Gang aft a-gley, [often go awry]” sentiment, while true, is not fully true. The issue is within “awry”, and who is the determinant of its proper qualitative position. If Robert deems himself the authority on what is “awry” and what is the actualization of “best laid” then truth is no larger than a dead mean.
Yet, another option is available. Perhaps the best laid plans of men are merely that; the plans of men. These same men live seventy years, die, and then rot into dust. Yet, in my estimation, not all of them dies; for they are not dead, dead…but this thought is moving off topic.
The point is this, the plans of men are continually frustrated, and “… lea'e us nought but grief an' pain.” Yet, such a pessimistic view leaves one longing for a gun and but one bullet, thus in finishing the above started Proverb is a welcome predicate.
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“…but the LORD directs his steps.”