Sanity simply means the ability to think and behave in a normal and rational manner.
HOW TO PROTECT YOUR SANITY
Feed Your Soul: Spend time doing things that grows your spirit. Studying God's word and praying to God helps you connect with your soul and keep it in a holy state. Feeding your soul also requires the help of the Holy Spirit. The Holy spirit guards you to the betterment of your soul. The Holy spirit will keep your soul healthy and sane.
Create Self-Time: Making out time for yourself helps nurture your body, soul and mind. Pick days where you'll be alone doing things that will make you happy.
Guide And Protect Your Heart: Protecting your heart means keeping your heart happy with the fear of God and a holy life. Always forgive, learn to love and be generous . Always try to make a good and right decision no matter the circumstances.