"But the tax collector stood at a distance. He would not even look up to heaven, but beat his breast and said, 'God have mercy on me, a sinner'" (Luke 18:13).
In stark contrast to the Pharisee who spoke of himself in comparison to others, this tax collector prayed with great humility, self-awareness and recognizing himself, his shortage, and his source.
He knew who he was. He was a inner. He wasn't trying to defend, justify, or compare. He knew what he needed. He needed mercy. What he deserved was condemnation - nothing more, nothing less. And, he knew who could supply all that he needed. He approached God. He called on God. He surrendered and humbled himself before God.
We can never think that we are greater than who we really are. It is so much easier to compare ourselves to others in order to either feel better about ourselves, or to not have to focus on our own realities. On our own, there is nothing great about us, about who we are, or even what we are capable of doing. We must be aware of who we are, and who we are not. Aside from the grace and the purpose of God, we are nothing. But because of His grace and purpose, we are children of God, planned by God, and called by God. All that we are and all that we do is because of who HE is.
Regardless of any title, occupation, or success that you may achieve in life, you are a sinner. We all are. You are in need of the grace, mercy, and love of Almighty God. Recognize that it is Jesus who is the source of all you are lacking in your life. Depend on Him. Rely on Him. When you are honestly aware of who you are, you can truly appreciate who He is.