Sure it is. You can ask and answer the statements:
a) I have always lived up to my own moral code (whatever it is). T/F
b) I am always truthful, always kind, always faithful, always honest. (I have never been deceitful, never been mean, never been faithless, I have never cheated anyone. T/F
c) I have never acted in a selfish manner. T/F
d) There is no gap in me between what I "ought-to-be" and what I "am". T/F
e) I am a perfect moral being. T/F
f) I have never mistreated another human being in any way, by, e.g., being rude to them, ignoring them, looking down on them in my heart, having bad thoughts about them.
g) My thoughts towards others are unfailingly pure. E.g., I have never thought or said anything unkind either about or to the author of the Ball Bounces. T/F
The standard is perfection.
Score: 7 - you do not consider yourself a sinner.
1-6 - you are a sinner.
The Bible declares,
A. "All have sinned and come short of the glory of God". You can "test" this for yourself.
B. "The wages of sin (what sin gets you) is death". You can reason about this. Is it reasonable that sin based on a corrupt nature would disqualify you from eternal life in God's perfect, unblemished heaven?
C. "The gift of God is eternal life through Jesus Christ." This is where the jump of faith comes in. It's not a big leap. Either God has made a provision for you, or he has not. Either he loves you, or he does not. Either there is meaning and purpose to life, or there is not. Either there is hope, or there is not. Either the longings in your heart for life beyond the grave are satisfiable, or they are a cruel deposit of amoral, unfeeling evolution.
Regain your humanity. Rebel against the atheist machine.™