Equivalent idiom for "God does not have a stick"

Man proposes, God disposes dictionary.com

The phrase "Man proposes, but God disposes" is a translation of the Latin phrase "Homo proponit, sed Deus disponit" from Book I, chapter 19, of The Imitation of Christ, a 15th-century book by the German cleric Thomas à Kempis. wikipedia

A painting: inspired by the search for Franklin's lost expedition which disappeared in the Arctic after 1845

Grandma always said,

...a common American English proverb that isn't directly quoted from the Bible, although loosely based on a hymn by the devout Christian, Thomas Cowper (1731-1800), who is thought by many to have based his lyrics on Habakkuk 1:5 (KJV, Old Testament):

Behold ye among the heathen, and regard, and wonder marvelously: for I will work a work in your days which ye will not believe, though it be told you.

Following the link to Bible Tools we may find a discussion of the proverb in question and how it relates to both, the hymn and the Bible verse:

What is astounding is how He chooses to [work] because He does it far differently than we would. As the old saying goes, "God works in mysterious ways His wonders to perform." [quoting Cowper's hymn lyrics]. To a man's way of thinking, His works are truly mysterious; sometimes, we do not have a clue how He works.

Sow the wind, reap the whirlwind:

Every decision has consequences; a person's actions will come back to him.

(Wiktionary)