It means that every aspect of salvation is initiated and completed by God's sovereign will and grace.
The doctrine that salvation is entirely of God underscores His sovereignty and grace in the redemption of His people. As highlighted throughout Scripture, particularly in passages like 2 Corinthians 3:6, our sufficiency relies solely upon God’s providential workings. This dynamic means that God is the initiator, sustainer, and completer of salvation. His work is effectual in the hearts of sinners, drawing them to Himself and granting them faith. This truth is a source of immense comfort, assuring believers that their salvation does not depend on their actions, but on God's unfailing promises and the finished work of Christ.
Commentary