The Psalmist wrote that we are like the grass that flourishes and grows in the morning, but is cut down and withers in the evening. But still many people spend much time considering their station in life without ever preparing for the fact that they will someday die, and spend eternity somewhere. I believe that's what the rich man thought as well. But that very night he died. Some people teach that no one really can know if they are headed for Heaven.
All humans are sinners.
We have all done something wrong at one time or another. In fact, if we will be really honest, we are continually doing, saying, and thinking things that are contrary to the Bible and displeasing to God. We all come short of God's glory. But the fact remains that none of us measure up to the standard of perfection which our holy God has established. In other words, what I earn, or deserve, for being a sinner, is death.