Spiritual peace according to Scripture:
Romans 5:1— Spiritual peace is a result of our justification through our Lord Jesus Christ.
Romans 14:17; Gal.5:22—– Spiritual peace is a fruit of the Holy Spirit. [ Rom.14:17 ] For the kingdom of God is not meat and drink; but righteousness, and peace, and joy in the Holy Ghost.
Proverbs 3:13,17—- Divine wisdom gives spiritual peace.
Romans 15:13—— Now the God of hope fill you with all joy and peace in believing, that ye may abound in hope, through the power of the Holy Ghost.