We often reduce "peace" to a calm feeling in the chest. While that is part of it, the biblical definition is much stronger. If you ask a Hebrew scholar about the word Shalom (שָׁלוֹם), they will tell you it isn't just an internal emotion.

According to Mounce’s Complete Expository Dictionary, Shalom (שָׁלוֹם) translates to prosperity, well-being, health, completeness, and safety.

When the Bible promises peace, it is promising a life that is "whole." It means nothing is missing and nothing is broken. It is a physical, financial, and relational reality.

Whatever he does prospers. And the Lord will bless you. And you shall lend unto many nations, and you shall not borrow. Deuteronomy 28:12

This is the "good success" mentioned in Joshua 1:8. It isn't just a full bank account; it is the absence of the "painful toil" that usually accompanies it. In the New Testament, this same concept is translated into the Greek word Eirene (εἰρήνη).

Whether in Hebrew or Greek, the message is the same: God’s peace covers your health and your checkbook as much as your heart.