It repenteth me... — “God does not feel the pain of remorse (says St. Augustine in Psalms 131), nor is He ever deceived, so as to desire to correct anything in which He has erred. But as a man desires to make a change when he repents, so when God is said in Scripture to repent, we may expect a change from Him. He changed Saul’s kingdom when it is said He repented of making him king.” — Bishop Wordsworth.
And it grieved Samuel — “Many grave thoughts seem to have presented themselves at once to Samuel, and to have disturbed his mind when he reflected on the dishonour which would be inflicted upon the name of God, and the occasion which the rejection and deposition of Saul would furnish to wicked men for blaspheming the invisible King of Israel... For Saul had been chosen by God Himself from all the people, and called by Him to the throne; if, therefore, he was deposed, it seemed likely that the worship of God would be overturned, and the greatest disturbance ensue.” — Calvin, quoted by Keil. Abarbanel tells us respecting Samuel’s grief that he was angry and displeased, because he loved Saul for his beauty and heroism, and as his own creature whom he had made king; and that he prayed all night because God had not revealed to him Saul’s sin, and he wished to know why sentence was pronounced against him.
And he cried unto the Lord all night. — This was, no doubt, that “piercing shrill cry” peculiar to Samuel. With this strange cry he seems to have on many a solemn occasion spoken with his God. He is often in this book represented as thus “crying unto God.” (See Stanley’s Lectures on the Jewish Church, Vol. I., 1 Samuel 18)