Peace of mind has nothing to do with the external world; it has only to do with our connection with God. Love really is the answer. We're here only to teach love. When we're doing that, our souls are singing and dancing. When we remind ourselves that we are spiritual beings, that life and love are the flame eternal, that's when our soul is nourished.
The presence of love kindles into the will a fire of sacred love. Being always with the Holy One, who is a consuming fire, reduces to ashes whatever can be in opposition to it. The soul thus aflame can no longer live except in the Presence, a presence that produces in its heart a holy ardor, a sacred eagerness, and a fierce yearning to see God loved, known, served, and loved by all creatures.