How do we know that salvation is freely given?

Salvation is shown to be freely given through passages like Romans 8:31-32, which affirm that God, having spared His own Son, will also freely give us all things. The nature of salvation in Scripture is not based on the works or decisions of individuals; instead, it is grounded in Christ’s obedience and sacrifice, which secured these blessings. Therefore, God's ability to offer these gifts freely comes from the complete work of Christ on the cross, demonstrating that it is grace alone, apart from works, that justifies the sinner before God.