A) The profound message that Psalms convey is that even in our darkest moments, there is a ray of hope that emanates from the Son of God Himself. Psalm 55:20 discusses someone who has violated a covenant. This could be a family member or a friend, but it's someone within our trusted circle. This brings to mind the song "Will the Circle Be Unbroken". 

B) Indeed, many interpret this as the Antichrist breaking the covenant with Israel, initiating or during the tribulation. However, in context, it pertains to personal betrayal by someone who has made a commitment to you. Recent events have shown that Israel, as a nation, can be easily betrayed. But don't be deceived. Even those who are close allies to us and to the faith can betray us. There is only One who will never fail us.

C) Verse 21 cautions us to be wary. Some individuals have a remarkable way with words, their speech as smooth as butter. But remember, let God be true and every man a liar. Beneath those words lies nothing but a desire for conflict and war. This likely has prophetic implications for future encounters with the man of lawlessness, but it also pertains to those who are simply lawless.

D) Amidst all these things, we encounter a scripture that is reiterated in the New Testament: "Cast your burden unto the Lord, and He will sustain you. He will never permit the righteous to be moved." To cast a burden is to throw it off ourselves. The Hebrew word for "to be sustained" is "chewel", which means to maintain, nourish, provide food, hold up, protect, support, and defend. That's what the Lord does for us.