What is the role of the Holy Spirit in our salvation?

In Romans 8:26-27, the Apostle Paul explains that the Holy Spirit helps our infirmities and intercedes for us according to the will of God. This indicates that even in our weakness, the Spirit is actively working on behalf of believers, ensuring that our prayers align with God's purposes. Moreover, the Spirit is the guarantee of our inheritance, providing assurance of salvation and transforming us into the likeness of Christ, thus making Him an indispensable part of the believer's journey of faith.