Doesn't it sound wonderful to be kept in perfect peace?
This reminds me of those "if/then" statements we used to have to do in math class. Forgive me, Mrs. Logan, if you're reading this...I wasn't very good at those then and it appears not much has changed!
If we keep our mind stayed on HIM and trust in HIM, then HE will keep us in perfect peace. He keeps us in perfect peace because we trust in Him. The way we show that we trust Him is to keep our mind set on Him. It's just that simple.
Airplane pilots landing on a battleship in the ocean "call the ball" to ensure they have their eyes fixed on the landing place as to not fall short or overshoot the small landing strip on the ship. Baseball, hockey, tennis and football greats keep their "eye on the ball" (or puck) when catching or swinging at it. They know where their focus must be. Runners don't cross the finish line looking down at their shoes or up in the stands. They cross it looking straight ahead, turning neither left nor right.
Our Christian life must be the same. Keeping our mind focused on the One who gave His life for us. Looking ahead at the prize before us. With just a glimmer of heaven and the perserverance of all those who came before us. Running the race with endurance that is set before us. (Hebrews 12:1)
What is your mind stayed on today?