The OT passage outlines the protocol for atoning for sin. Sin has a price and a consequence. This very set of instructions indicates that people will sin and what they need to do when that happens. We have the knowledge of Christ's death and resurrection that ultimately paid the price for our sins but we still need to ask and receive that forgiveness.
The NT passage talks about how Jesus called the apostles and how Jesus preached the truth. He didn't choose the smartest, most prestigious, the richest, the most loyal, or even the most perfect people. He took people where they were and used them as they were for His purpose. Jesus didn't shy away from hard questions, from insults, and from the questions of people searching for answers. He knew his time to accomplish his mission was short and the task was big.
Psalms speaks such encouragement when you are feeling unworthy, overwhelmed, or unsure:
4 Take delight in the ,
Tomorrow's Bible In a Year Passage: Leviticus 7:28-9:6Mark 3:31-4:25Psalm 37:12-29Proverbs 10:5