What does it mean to be 'called' according to Scripture?

The concept of being 'called' is pivotal in understanding God's redemptive plan. Romans 8:30 states that whom He predestined, these He also called. This calling is an effectual one, distinct from a general invitation to all. It signifies God's sovereign initiative in drawing people to salvation. Those who are called recognize Christ as the power of God unto salvation (1 Corinthians 1:24) and respond to His grace. The assurance is that every individual who genuinely seeks His mercy does so because they have been called by God, emphasizing the necessity of divine intervention in the salvation process.