All Scripture is profitable.
Whether or not we fully understand something God is teaching us through His Word is not what makes it profitable or not. God knows we are works in progress. His Word does not return void, so all of Scripture is profitable to us as Christians. We need simply to believe what He says, and trust that in His timing He will reveal to us all that it means.
To those who do not yet know Jesus as their Lord and Savior, the words in the Bible are just words. To those of us in Christ, the Bible is a love letter. It tells us about how much God loves us. It warns us what not to do, and tells us what to do - Worship Him with our praise! Our lives are to be one continual song of praise to God.
God knows that even though we are forgiven, we are not yet perfect and we will still stumble. That is where the reproof and correction parts come in. He uses His Word to point out our sins and lead us back to him. He begins gently, but when we are heard-headed and resist His correction, He will bring us to the very ends of ourselves to show us our great need for Him! Learn to listen to His Word as you read and study your Bible, a gentle reproof is much easier to handle than a strong correction.
May you find God's instructions to you each day as your read the Scriptures.
May He thoroughly equip you for every good work!