How do we know we are alive in Christ?

According to the sermon, the presence of struggle with sin is a clear indicator of being spiritually alive. Before experiencing regeneration, we had no internal conflict regarding sin, but upon receiving new life in Christ, we begin to wrestle with our sinful nature. This duality—the old self and the new creation—reflects the teachings of Scripture where Paul describes the ongoing battle between the flesh and the Spirit. The struggle itself is evidence of life, suggesting that those who are truly alive in Christ will experience this tension as they grapple with their old nature in pursuit of holiness.