God is not a man, so don’t try to compare Him to one. God and man live by different standards and live their lives in different ways. Unlike man, who lies to avoid shame and judgment, God finds no need for deception. He does not feel shame, for He is the embodiment and the arbiter of Truth. Nor does He fear retribution, because He is the First Cause for creation and for behavior. Others cannot and will not influence Him. To permit this would abdicate His position as First Cause. Even when God became flesh and dwelt among us, the change of venue did not persuade Him to change His character.
He is also not a son of man. People procrastinate and change their minds. God is a planner and a doer. He is not wishy-washy. From the beginning, His voice has declared His purposes and His person, generating a continuous line of creating moments where He has permanently altered reality. From darkness becoming light to sinners becoming saved, God has been intentional. His promises are fulfilled, because He has spoken. He is not a man, nor a son of man. He is the continuously creating, truthful, immutable, redeeming God.