Just as simply put, the expression, "An apple a day can keep the doctor away," in a world capable of preventing disease, with a medical/pharmaceutical hierarchy that insists on treating disease, prioritizing profit over people - so is my fascination with the KISS Principle that things can indeed be left simple and not made unnecessarily complicated!
1/ Why do we continue to overcomplicate anything and EVERYTHING in life; how often do we use algebra or the laws of relativity?
2/ Why do we continue to make up our own rules regarding anything and EVERYTHING in life; if the guide book says this is law, who are we to break it, or not to enforce it?
3/ Why do we talk more and listen less, concerning anything and EVERYTHING in life; how many PhD-Know-It-All-Wanna-Be's, do we find on the faceless internet social medias?
In this updated post from 2021, allow me to share a few bold points.
We have taken a simple open and shut case of a PlanDemic disguised as a pandemic and turned it into a continual rehashing of every angle, imaginable and unimaginable, turning a simple matter into a profound and extremely over-complicated matter!
We have taken a simple driver-instructor-handbook, same one for all of us, and turned simple rules and regulations, as with the '10 Commandments,' into suggestions; we turn left into right-hand lanes * right into left-hand lanes * we don't use stop signs * and we drive fulltime in the left emergency lane (PASSING LANE - KEEP RIGHT EXCEPT TO PASS - SLOWER TRAFFIC KEEP RIGHT), etc., etc., Yes? No?
We have taken mountains of known fact - faceybook steals our information and sells it over and over again - and all major social medias (twitter, youtube, vimeo), block our free speech, long proven to be part of the evil PlanDemic holding us hostage - BUT STILL we trade in our PRINCIPLES for the CONVENIENCES of ongoing use of the very same medias TRYING TO KILLS US - guilty as charged, HELLO!
I Know Truth Hurts, But Hey, Am I or Am I Not, Speaking Bold Truth?
The Kiss Principle, spelled out beyond its acronym (KISS - Keep it Simple Stupid/Silly), reads:
The KISS principle states that most systems work best if they are kept simple rather than made complicated; therefore, simplicity should be a key goal in design, and unnecessary complexity should be avoided.
What your humble and honest friend is aiming to share with you, is that we have no one to blame but ourselves for overcomplicating anything in life intended by our Creator & Savior to be simple - thus the title - Kiss Principle Simple EVERYTHING!
And Christian, sadly but lovingly, you're at the top of the list because of the example you're setting. How can you boast of Jesus when you don't know Jesus? You can't know Jesus without reading His living word that teaches you about Jesus, and the example you are setting for the world to see is not the loving, non-judging, life-saving, soul-securing Jesus of the Protestant Holy Bible (66 books not 73), but instead - a finger-pointing hypocrite judging his fellow Christian and all mankind.
Perhaps it's not all your fault? Maybe you're being taught the living word in an unfamiliar tongue, or text, convinced that the KJV (King James Version) is the 'ONLY' true 'TRUSTED' word of God, which is not true; we don't speak Shakespearian! MEANING, it would benefit you greatly to ENJOY the living word of God in today's language, HERE, thus identifying with keeping in sync with this post title, Kiss Principle Simple EVERYTHING! 
We human beings, continue prioritizing anything and EVERYTHING but the undeniable, perfect, inerrant and infallible truth of a living God, whom the world has demonically and intentionally propagated for centuries that Jesus is liar, a fake, and anything but the ONE He claimed to be and proved it; and surprise, surprise, we find Him at -0 on a 1-10 scale, and ANYTHING & EVERYTHING but truth at #10?
In speaking to Israel, the chosen Hebrew people (571 B.C), God asked them, "Am I the one not doing what’s right, or is it you?"
When MOST EVERYTHING from the beginning of time, even the past two hundred years alone, continues to let us down (false promises / wars / famine / earthquakes / plandemics), over, and over again ... and the ONE whom we have been told to be a liar and a lunatic, is in fact saying to us in a book that cannot be discredited on any count -
"For I know the plans I have for you,” says the LORD. “They are plans for good and not for disaster, to give you a future and a hope," or perhaps
"But those who trust in the LORD will find new strength. They will soar high on wings like eagles. They will run and not grow weary. They will walk and not faint," or
"Come to me, all of you who are weary and carry heavy burdens, and I will give you rest," or
"I am the resurrection and the life. Anyone who believes in me will live, even after dying," ...
... is it possible that 'YOU' also are guilty of following and accepting the very lies of life itself, missing the truth needed, leaving your soul at risk, considering that God also tells us, "What do you benefit if you gain the whole world but lose your own soul?"
Dare you ponder this game of life, knowing that today, tomorrow, God only knows, may be your last. Therefore, wisdom says to secure your soul now, this very moment - between you and Jesus - author of life, promised Messiah, and Savior of the world.
Open & trust Romans 10:9 - remembering that 'PERFECTION IS NOT NEEDED,' only a humble and sincere heart - knowing no sin is too bad or wrong to be forgiven and made perfect in Christ by faith alone in the blink of an eye with a simple decision, with your soul safe and secure in that instant, for all eternity, amen - thank you, Jesus!