Praise God For A Miraculous Deliverance
Psalm 124 calls on the people of God to take notice of their deliverance and to praise God for it. David wrote this psalm to celebrate and give glory to God for deliverance from some very great danger. It may have been a foreign invasion of an insurrection. Whatever the issue he was personally affected as were others. He realized that had it not been for the goodness of God in making a way for them to escape it would have resulted in disaster. He is careful to give all the glory to God.
When we think back over our lives imagine what would have happened if the Lord had left us, and then reflect on what has happened because he has been faithful to us. Just thinking about it should, like it did David, make us sing unto the Lord.