How do we know salvation by faith is true?

The truth of salvation by faith alone is grounded in Scripture, as illustrated by Romans 4:5, which states, 'But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness.' This passage illustrates that salvation is not based on human efforts or adherence to the law but is entirely a work of God's grace. Kohlbrugge's testimony resonates deeply here, as he acknowledged his own inability to earn salvation or adhere to God’s commandments. It is this understanding that leads to the assurance that faith in Christ, rather than works, secures a right relationship with God, highlighting the core of the Reformed belief in justification by faith alone.