8:16The Spirit itself beareth witness with our spirit, that we are the children of God:
1:10Wherefore the rather, brethren, give diligence to make your calling and election sure: for if ye do these things, ye shall never fall:
2:3And hereby we do know that we know him, if we keep his commandments.
3:14We know that we have passed from death unto life, because we love the brethren. He that loveth not his brother abideth in death.
5:13These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God.