“For I know the thoughts that I think toward you, saith the LORD, thoughts of peace, and not of evil, to give you an expected end.” (Jeremiah 29:11)
The word translated peace is Shalom, which is a Hebrew word meaning peace, harmony, wholeness, completeness, prosperity, welfare and tranquility (from Wikipedia). Refinersfire.org, quoting one of Strong’s Concordances says, “Shalom means completeness, wholeness, health, peace, welfare, safety, soundness, tranquility, prosperity, perfectness, fullness, rest, harmony, the absence of agitation or discord. Shalom comes from the root verb shalom meaning to be complete, perfect and full.” The Brown-Driver-Briggs Hebrew-English lexicon, though more difficult to read, confirms these meanings plus more.
Every intention of shalom is goodness. So, God wants us to sit back and enjoy pondering His thoughts of peace toward us. He thinks healing thoughts toward us, He thinks prosperity thoughts toward us, He thinks wholeness thoughts toward us, He thinks harmony and safety thoughts toward us. He never thinks thoughts toward us that are agitated or dark or that portend sickness, anxiety, distress, or any other evil. His thoughts toward us are full of wholeness, good welfare, harmony, completeness. These are thoughts worth thinking over and over and telling yourself over and over until you realize God really is like this.