Isaiah 26:3 (NKJV)
Peace is something that pretty much everyone wants. No one really desires to live in a constant state of being distressed and unhappy, but sometimes that is the way people live. Some people think that getting everyone and everything else around them in order is what they need, but what they really need is personal peace. Many people deal with depression, anxiety, fear, worry, and other similar issues and they have no peace, let alone perfect peace. All these issues stem from the things we think about; what we think about determines whether or not we will live in peace.
Many people have problems in their thought life, they are often thinking about the wrong kinds of things and this leads to turmoil in their mind and in their life. When we face a difficult situation we usually start thinking about what we need to do to solve the problem. What we should do first is to think about what the Bible has to say and see what God's solution to the problem is. While I am certainly not saying we can't use some good plans and ideas that come from the things we already know and understand, we cannot live a successful life just by figuring everything out on our own.
What can we do to live in peace? Isaiah 26:3 tells us how to do this; we need to keep our mind focused on God. We also see that it says in Isaiah that a person is kept in perfect peace because that person trusts in God. Many times we are getting stressed and worried about some situation because we are not trusting God and focusing on His Word. We must fill our mind with God's Word; when our thoughts line up with God's thoughts we will live in peace. When our thoughts are not in agreement with what the Bible has to say we will not have peace. Put God's Word in first place in your life and focus your thoughts on Him, that is how you can live in perfect peace.