"For God so loved the world that He gave His only son, that whoever believes in Him will not die but will have eternal life." John 3:16
Jesus lived a perfect, sinless life, but died on a cross.
Why did Jesus have to die?
He died for you.
The Reason He died was because of your sin.
When you break God's laws, He calls that a sin.
Not only have you lied to someone else or taken something from them, but you have broken God's laws. You have sinned against God and He is holy.
"Against You, You only, I have sinned and done what is evil in Your sight."