We know.

1 John 2:3
And hereby we do know that we know him, if we keep his commandments.

1 John 5:2,13,19,20
By this we know that we love the children of God, when we love God, and keep his commandments…

2 Corinthians 5:1
For we know that if our earthly house of this tabernacle were dissolved, we have a building of God, an house not made with hands, eternal in the heavens.

we have.

Luke 15:24,32
For this my son was dead, and is alive again; he was lost, and is found. And they began to be merry…

John 5:24
Verily, verily, I say unto you, He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life.

Ephesians 2:1,5
And you hath he quickened, who were dead in trespasses and sins; …

because.

1 John 2:10
He that loveth his brother abideth in the light, and there is none occasion of stumbling in him.

1 John 3:23
And this is his commandment, That we should believe on the name of his Son Jesus Christ, and love one another, as he gave us commandment.

1 John 4:7,8,12,21
Beloved, let us love one another: for love is of God; and every one that loveth is born of God, and knoweth God…

that loveth.

1 John 2:9,11
He that saith he is in the light, and hateth his brother, is in darkness even until now…

1 John 4:20
If a man say, I love God, and hateth his brother, he is a liar: for he that loveth not his brother whom he hath seen, how can he love God whom he hath not seen?

Proverbs 21:16
The man that wandereth out of the way of understanding shall remain in the congregation of the dead.