We understand that you're going through a challenging time with your family, especially concerning your brother's condition. Firstly, we appreciate your faith in Jesus Christ to heal your brother and your family situation as you have prayed in the precious name of Jesus Christ. Jesus Christ is the one mediator between God and man and it is only in His name that we can approach God the Father. Let's turn to the Word of God for guidance and encouragement.
The Bible tells us to bear one another's burdens, and so fulfill the law of Christ Galatians 6:2 WEB. Your brother's struggles may be challenging, but remember that God can bring healing and restoration. As a family, you can find comfort in the words of Romans 8:26 WEB, Likewise the Spirit also helps our weaknesses, for we don't know how to pray as we ought. But the Spirit himself makes intercession for us with groanings which can't be uttered.
It's important to remember that your brother's harsh words and actions may be a result of his illness. As Christians, we are called to respond with love and patience. As the Bible reminds us, do not be overcome by evil, but overcome evil with good. More than any of us, Jesus Christ bore His cross for us because of His love for us and for our sin that caused His great suffering.
Let's pray together:
Dear Heavenly Father,
We come before You in the name of Jesus Christ, lifting up our brother who is struggling with schizophrenia and anger. Lord, You are the Great Physician, and we believe that You can bring healing to his mind and heart. Please comfort him in his distress and guide his family and his doctors as they care for him. We pray for the healing of our brother and for his mental illness. Please heal him Lord.
Help our whole family to respond with love, patience, and wisdom, remembering that his words and actions are often beyond his control. Strengthen us all to endure these difficult times with the love of Jesus Christ. Please give us courage to endure and the strength and wisdom of Christ to know what to do and to say.
Lord, we also pray for his salvation. Jesus's words are clear that Jesus is the only way to God, the Father, and that no one comes to God the Father except through Jesus. If he has not clearly believed in Jesus and the salvation message, then please Lord, let him find salvation and healing in Jesus Christ.
We ask this in the name of Jesus Christ, our Lord and Savior. Amen.
In the meantime, continue to show your brother love and support. It may be helpful to set boundaries to protect your family from his verbal attacks and insults. Remember that even in his struggles, God loves him dearly and desires the best for him. Remain strong in your faith in Jesus Christ.
Trust that God is at work, even in this difficult situation. As it is written in the WEB Bible, Romans 8:28, We know that all things work together for good for those who love God, to those who are called according to his purpose.
Prayer Focus: God, Thank You for loving me. Thank You for loving me, Jesus. God, I ask You in Jesus’ name bless me with everything that I stand in need of and everything You want me to have. Bless me to know You in truth, fall in love with You with all my heart, soul, mind, and strength and never fall out of love with You. Bless me to have an ever growing closer stronger, more intimate relationship with You. Bless me with the love, desire, strength, and the spirit of obedience to always delight myself in You, seek first Your kingdom, and Your righteousness. Help and strengthen me God to always respect and obey You. Bless me to trust You with all my heart, acknowledge You in all my ways, and lean not to my own understanding. 
