If the Holy Spirit is at work in our lives, if He is convicting us of sin, if He is giving us faith in Jesus Christ, if He is persuading us that the Bible is God’s Word, if He is enabling us to call God Father, if He is making us fruitful in ministry, if He is helping us grow in grace – if the Spirit is doing any of these things at all – then no matter how much we are struggling in the Christian life, we have God’s seal of our eternal salvation.