What does it mean to be called by Christ?

In Luke 5:27-28, we see Jesus calling Levi the publican, who responded by leaving everything behind to follow Him. This act of calling signifies God's sovereign grace at work. It emphasizes that God initiates the relationship, drawing sinners to Himself (John 6:44). Salvation is not a matter of human effort but a result of God's grace that transforms the heart and inclinations of the individual. This call is ultimately effective for His elect, leading them to genuine faith and repentance, as outlined in 2 Timothy 1:9, which speaks of God who calls us not according to our works but according to His own purpose and grace.