Levi teaches us an important lesson and that is even though we have our issues we are still fit for service. Levi like is his brother was revengeful and truth be told so are we. However that did not keep the Lord from utilizing the Levites for his service. That's encouraging to know that I am not define by my issue. This brings to mind the gospel even though the temple was destroyed and the Judeans were disperse or scattered due to persecution the gospel was still being spread. In other words God can still accomplish God's purpose even when it seems like bad things are happening.
Levi teaches us that in simple terms that you don't have to be perfect to serve the Lord. For the Romans writer extols that all have sinned and fallen short of the glory of God.
Scripture Reference: Genesis 49