I am going to start at the end of this verse and work my way back this morning. We have an enemy, a very real adversary. The Bible lets us know that our enemy is not flesh and blood, but demonic forces that are led by the devil who is out to steal, kill and destroy us. This enemy is relentless in his plan to destroy us. His attacks come in all forms and through different sources. But I have good news for you concerning this enemy-- he has been defeated!!! Jesus dealt him a "head blow" at the cross, He destroyed his works, he is a defeated adversary. But although he is defeated he still keeps trying to destroy us, He won't give up. He comes to destroy us through trials, difficulties, hardships, sickness, conflicts, on so on. But again, even in those personal, ongoing attacks we still have the assurance that he is defeated. We also have the promise that there is coming a day when our enemy will be completely destroyed once and for all. "And the God of peace shall bruise Satan under your feet shortly. The grace of our Lord Jesus Christ be with you. Amen." (Romans 16:20)
So now let me move to the middle of the verse. Until that day comes when he is destroyed and cast out once and for all, until we see his defeat in our own personal trails, there is a characteristic that the righteous man/person should exhibit- "He shall not be afraid". Until that time comes, we should be living in peace, not fear. How is that possible when the adversary is raging, when the attacks are strong, when the situation looks like defeat instead of victory?
Let's now move to the very beginning of the verse. It's because "his heart is established." Literally it means that his heart is at rest because it is leaning upon something. We don't have to be anxious, fearful, worried, fretful, with feelings of defeat because our heart is resting upon the Lord. It is resting upon His promises, upon His provisions, upon His word, upon His strength, upon His victory. Our hearts are resting by faith in our Lord who is the One who has already destroyed and will destroy the adversary that comes against us.
When your heart is established in the Lord and His word, you have nothing to fear- not even the enemy- because you are resting upon an unmovable, unshakable, solid Rock, which is the Lord Himself.
Have a great day. Until we see our enemy's destruction, we must let the peace of God rule and reign in our hearts, and this is done by leaning upon Him and His promises.
For further reading:
1 John 3:8