Psalm 111 is short but praises God for a variety of reasons: His creation, His moral oversight in righteousness, graciousness, mercy, and His provision of food. It also praises God for His covenant with His people and His holy commandments which lead to wisdom and understanding.
In 1 Corinthians 8:1-13, the Apostle Paul deals with the issue of foods that may have been offered to idols or blessed in pagan rituals. The food itself is not polluted by such associations, and a Christian may eat without spiritual danger. However, a Christian must be careful about offense to tender consciences.
The Gospel from Mark 1:21-28 deals with the issue of Jesus' authority. Unlike the first-century religious scholars who usually cited past teachers as authorities, Jesus claimed immediate authority in spiritual matters. In this passage, we see two aspects of Christ's authority. 1) He is Lord of the Sabbath who does the work of His Father whenever He sees the need, and 2) His authority extends into the realm of spirits, and even evil spirits must obey His commands. Thus, it was that people were amazed and Jesus' fame spread. May we continue to be aware of His authority each day and join in spreading knowledge of Him!