Peace of Mind: A Blessing from God

Brian Tracy once wrote, "Set peace of mind as your highest goal, and organize your life around it." 
Is that truly our highest goal? What about our standing with God? Shouldn't that be a higher priority? I thought about that, and came to this conclusion:

Peace of mind can only come when we are right with God. In fact true, inner peace is a gift of the Spirit. It comes when our hearts and minds are aligned with the teachings of Christ.
So, in that way, Brian Tracy was right. If our highest goal is peace of mind, we will have to include the spiritual dimension of our life. We will have to be in complete harmony with the truth and light of Christ.