Synopsis of the Books of the Bible, by John Nelson Darby, [1857-62], at sacred-texts.com
Psalm 55 is a distressing picture of wickedness in Jerusalem. The speaker is outside, but has experienced this wickedness in the treachery of his dearest friends. His resource is in God: Jehovah will save. He is looking back, I judge, at all that he had experienced in Jerusalem. Wickedness went about her walls. Wickedness, deceit, and guile were in her midst, nor departed from her streets. He would fain have fled from it all. The enemy was without, the wicked within; but they charged the godly with wickedness, and utterly hated them; but worst of all was the heartless treachery of those within, those with whom the godly had gone in company to the house of God. Still his trust was in God, for where else should he seek help?