I wanted to make a couple comments about our 1 Corinthians passage.
The first thing that stuck out at me was "love builds up". We are to love our fellow believers and our enemies, and one of the ways we do that is to build them up. We need to encourage them. We need to look for the good in them that can glorify God. We need to watch our tongue and make sure that the things we say build them up instead of tear them down.
The next thing was the part about there being one God, one Lord. There is only One God and that is our triune God - the Father, the Son, and the Holy Spirit. He alone is worthy of our worship and praise. He created everything, and everything was created for His glory alone.
The last thing was the part about denying something we want for the sake of a fellow believer. We are to be selfless, thinking of others ahead of ourselves. Throwing our freedom in someone else's face is not love, it is selfish and arrogant. Sacrificing ourselves for the sake of our brother is love, and is what we are called to do for the good of others and the glory of God.
Tomorrow's Bible In a Year Passage passage: Job 25-27; 1 Corinthians 9