The demon that Jesus drives out knows who He is. But knowing that Jesus is the Holy One of God will not save the demon from hell. Knowledge is not faith. To know something is not the same thing as trusting someone. Faith is trusting in the Lord Jesus Christ for salvation. Mere knowledge of the facts does not give life: trusting in the living God is how we receive life. Knowledge doesn’t necessarily lead anywhere — but a living faith in the Lord Jesus leads to a life build on Him and walking in His footsteps.