Him we preach, warning every man and teaching every man in all wisdom, that we may present every man perfect in Christ Jesus.
The word "perfect" means complete. It is not other people, things you own, nor your status in life that makes you complete. It is Jesus Christ and Him alone that makes your life complete and that is why they preached Christ to everyone. When we try to find our worth in what we do, what other people think of us, or in what we have in the natural we are always going to feel incomplete because in doing so we are trying to find our worth in the creation and not our Creator. It's not a selfie you take that everyone likes, nor getting compliments on something you've accomplished that makes you who you are. It is Christ who makes us what we are, a new creation. So look to Jesus to find your true worth and identity in life, not the world, other people, nor things in this world, and you will have all that completes you.