1 Peter 1:22
To love each other from the heart, to this we were called.
So likewise shall my heavenly Father do also unto you, if ye from your hearts forgive not every one his brother their trespasses.
To forgive each other from the heart, of this we are required.
The Kingdom consists of that which is from the heart, and from love. This is the substance of our Grace, the flavor of our abundant life (John 10:10), and the essence of our existence.
Yet, it is where we, for the most part, do not find ourselves always living.