“God is not man, that he should lie, or a son of man, that he should change his mind. Has he said, and will he not do it? Or has he spoken, and will he not fulfill it?”
God is not man,
Man H376: Contracted for אֱנוֹשׁ H582 (or perhaps rather from an unused root meaning to be extant); a man as an individual or a male person; often used as an adjunct to a more definite term (and in such cases frequently not expressed in translation.) H582: From אָנַשׁ H605; properly a mortal (and thus differeing from the more dignified אָדָם H120); hence a man in general (singly or collectively). It is often unexpressed in the English Version, especially when used in apposition with another word. H605: A primitive root; to be frail, feeble, or (figuratively) melancholy: - desperate (-ly wicked), incurable, sick, woeful.
That he should lie,
“By no means! Let God be true though every one were a liar, as it is written, ‘That you may be justified in your words, and prevail when you are judged.’”
Or a son of man,
Man H120: From אָדַם H119; ruddy, that is, a human being (an individual or the species, mankind, etc.): - X another, + hypocrite, + common sort, X low, man (mean, of low degree), person. H119: To show blood (in the face), that is, flush or turn rosy: - be (dyed, made) red (ruddy).
“But to those who are called, both Jews and Greeks, Christ the power of God and the wisdom of God.”
1 Corinthians 1:24
Son H1121: From בָּנָה H1129; a son (as a builder of the family name), in the widest sense (of literal and figurative relationship, including grandson, subject, nation, quality or condition, etc., (like אָב H1, אָח H251, etc.) H1129: A primitive root; to build (literally and figuratively).
“Bear fruits in keeping with repentance. And do not begin to say to yourselves, ‘We have Abraham as our father.’ For I tell you, God is able from these stones to raise up children for Abraham.”
That he should change his mind.
Change his mind (KJV: repent) H5162: A primitive root; properly to sigh, that is, breathe strongly; by implication to be sorry, that is, (in a favorable sense) to pity, console or (reflexively) rue ; or (unfavorably) to avenge (oneself): - comfort (self), ease [one's self], repent (-er, -ing, self).
“Repent, for the kingdom of heaven is at hand.”
Has he said, and will he not do it?
“But it is easier for heaven and earth to pass away than for one dot of the Law to become void.”
Or has he spoken, and will he not fulfill it?
“For, Yet a little while, and the coming one will come and will not delay;”
“And behold, I am coming soon. Blessed is the one who keeps the words of the prophecy of this book.”