A buddy of mine who is very out spoken about the need for repentance and a change in our lives (to be saved) asked a question on social media:
"Why is it SO hard to be Holy, and SO easy to be a sinner?" (emphasis mine).
Because of our human (fallen) nature. Paul mailed it in Romans 3.
Admitting that is the first part salvation.
What's worse is hypocritical piety. "Not me! I'm certainly not a sinner...." Or "I'm not as bad a sinner as so-and-so..." I know I'm no better than an axe murderer, and no worse than one who steals a penny.
We all fell with the angels when we strived to get close to God on our own.
Dude, it's HARD to be Holy. It's difficult to apply the attributes of God that we learned through Christ to our own lives.
I KNOW I'm going to sin. It happens everyday. That is why I need Jesus.
Grace is the only way. And that happened on the cross and is STILL happening on the cross.
So everyday, I get up, and go about my business. Trying not to sin. Trying to be Holy. Failing and falling, and relying on God's grace. And everyday HE is faithful to forgive, and to lift me up. And if I'm faithful and willing, he fixes me, makes me just a little better each day. ;D