Today's Psalms are Psalms 120-134, each one titled as "A Song of Ascents", a set of Psalms used by pilgrims on their way to Jerusalem for the feasts of Passover, Pentecost, and Booths. Most of the Psalms are rather short, only one is longer than ten verses long, so they were rather easy to memorize and made suitable hymns of praise for those walking to Jerusalem. I'll cover two Psalms tonight.
Psalm 130:
The Psalmist is troubled by his iniquity, and cries out to God. He notes that if God marks iniquities, no one would be able to stand before Him. Fortunately, there is forgiveness with God, so that we may fear Him (reverential fear, not fear of Him treating us maliciously).
The Psalmist waits for the Lord, and hopes in His word. His waiting is more anxious than than of the watchman for the morning. The Psalmist closes by urging the whole nation of Israel to also hope in the Lord, for His lovingkindness and redemption from all their iniquities.
Psalm 131:
David, who is attributed with this Psalm, puts his trust in the Lord, putting aside a proud heart and haughty eyes, not striving for greatness or things too difficult to do or to understand. He just rests in the Lord, like a weaned child with his mother. Again, the Psalm closes with an exhortation to Israel to do the same.
Both of these Psalms emphasize a simple, quiet, trust in God. Knowing that He forgives us, we are urged to drop our sins at His altar, and wait for Him, resting in His comfort and assurance.