For all have sinned and fall short of the glory of God. Rom. 3:23
There are many who hold the notion that man is basically good. Some even go further to claim that man will continue to get better and eventually create a utopia here on earth. Man was not only good but perfect from the time of creation until the fall.
The history of man since then till today is replete with depravity, moral decadence and is on a trajectory that is totally evil and hopeless. Just as it takes only one drop of poison to contaminate a gallon of milk and render it unfit for human consumption, so it took only one sin in Adam to render the whole human race unrighteous and aligned with evil.
God is the standard by which we are measured. You cannot compare yourself with a fellow human being.
God is holy, righteous, good, kind, merciful, just, faithful, immutable, wise, love, sovereign, etc. When all the attributes of God are merged, the result is the GLORY of God or the person of God. You cannot fall short in one of the attributes of God and not fall short in all the others since they are merged and cannot be separated. If we must all admit, there is no human being that is perfect in even just one of God’s attributes.
This is what the Bible calls sin – falling short of the glory or attributes or person of God. This is also why we needed a Savior who is perfect and sinless to save us. Jesus Christ is our only remedy for sin. Trust in Him today.