Front:
If you died today, do you KNOW (beyond a shadow of a doubt) where you would spend ETERNITY?

Reverse side:
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. For God sent not his Son into the world to condemn the world; but that the world through him might be saved. John 3:16-17

These 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. I John 5:13