8 I will
both [yachad] lay me down [shakab] in
peace, [shalowm] and sleep: [yashen] for thou, LORD, [Yahovah]
only [badad] makest me dwell [yashab] in safety. [betach] KJV-Interlinear
8 In peace
I will both lie down and sleep, For Thou alone, O Lord, dost make me to dwell
in safety. NASB
When in your life are you at your greatest risk of danger? When you are asleep.
When sleeping you are unconscious and rather oblivious to everything that is going on around you. The weather continues. The rivers and streams continue to flow unhindered. The traffic and world around you continue on their way regardless and in spite of your sleeping condition.
When sleeping you are aware of nothing. Whether dreaming or not, the world passes by without any hesitation or pause.
When you wake up, the world has recorded several hours of history which you missed entirely.
While asleep, a fire could occur, a tree could fall on your home, a flood could rise up and sweep you away, a criminal could cause you harm or worse. Nearly anything can happen while you are sleeping. You can even lose sleep because of the worries and stresses of life that prevent much needed rest.
But only weak and spiritually immature people would or could worry or are disturbed about the unknown or the uncertain.
Spiritually mature or spiritually advancing folks have confidence and a mental state of trust in God.
Spiritually mature folks have the same pressures and dangers of life that everyone else has. The only difference between the two, is doctrine learned and resident within the soul of the mature believer.
Peace is a relaxed mental state. Sleep is a state of trust in God. With everything out of and beyond ones control, then there is nothing to be gained through fretting and worry. They will not change your bills or obligations. They will not change your income or resources. They will not resolve one problem.
But without doctrine, the fretting and worrying in life are difficult to control. Therefore, a person needs a resource that gives them inner control and the ability to relax and be at ease.
That resource of Bible doctrine. And through doctrine, and from within your soul, God provides for you a safe place, a refuge, a confidence that helps you to live a mentally easier life.
Your circumstances will not go away, most probably. Your circumstances that you will face in life will vary from time to time, from year to year, from place to place. But God and doctrine are always there, consistent, and reliable.
The first psalm taught us that God has a plan. His plan calls for happiness's (plural) for each of our lives. Happiness's require a completeness of ones soul, of ones self. The completeness of ones self is accomplished by means of doctrine, by means of learning doctrine, by means of understanding doctrine and growing up and making truth the central foundation of your life.
Bible doctrine is the key to your life. You have to study it daily in order to learn it.
Psalm two taught us that man has a plan and that God has a plan. Mans plans (they are numerous) will all fail. Gods plan will succeed. Gods plan began in eternity past when one member of the trinity was assigned the title, Son of God. The divine plan centers around that person, the Son, who was to accomplish an eternal destiny for all who believe in Him. Rejection or indifference toward Gods plan is arrogance.
The soul is eternal, therefore the reasonable person will plan for the long term of his life (eternity), and not just the short term (this present life).
The third psalm taught us that the world is an enemy. The world does not care for your best interest. The world inundates each person with enticements and unfairness's, to distract you from God and Gods plan. It is easy to get caught up in the activities of ones life and forget or ignore God, but then the world surrounds you with an almost infinite variety of enemies, most of which you would never recognize as enemies, friendly such as they are. Your own attitude can be your worst enemy.
The fourth psalm teaches us to stand in awe of God, doctrine, and the spiritual life that He alone offers. Conform to His teaching and plan, and your life will be beyond better, and beyond anything that the world can offer.
Gods word, when learned, and adopted for your daily life, promotes peace and confidence and rest within your inner and total essence.