Moses
Deuteronomy 29:29BSB·traditional attribution

The secret things belong to the LORD our God, but the things revealed belong to us and to our children forever, so that we may follow all the words of this law.

John Calvin Reformed @genevareformer

29. The secret things belong. The conciseness and brevity of this passage has rendered its meaning ambiguous; still there is no necessity for discussing the various expositions of it. I will only shortly touch upon those most generally accepted, lest they should lead to error. The meaning is forced which some of the Hebrews S.M.

Matthew Henry Presbyterian @wholebiblehenry

It appears by the length of the sentences here, and by the copiousness and pungency of the expressions, that Moses, now that he was drawing near to the close of his discourse, was very warm and zealous, and very desirous to impress what he said upon the minds of this unthinking people.

Commenting on Deuteronomy 29:10-29

Jamieson-Fausset-Brown Reformed @jfbcommentary

The secret things belong unto the Lord--This verse has no apparent connection with the thread of discourse. It is thought to have been said in answer to the looks of astonishment or the words of inquiry as to whether they would be ever so wicked as to deserve such punishments.