[Phinneous]

A gentile can live a righteous life according to G-d’s will and his 7 commandments for non-Jews:

http://www.chabad.org/therebbe/article_cdo/aid/62221/jewish/Universal-Morality.htm

[Telepathic Intruder]

"I will put my law in their minds and write it on their hearts. I will be their God, and they will be my people."

Following a set of written-down rules with religious practice doesn't make you one of His people, in my opinion. Being one of His people makes you want to follow His rules, not the other way around. That's what is said to be a fruit of the spirit.

And unlike some Christians you may have heard about, not that I blame them, I don't worship Christ directly or say he is God. He is the way to salvation, not salvation itself. This is a very complicated subject, however. I refer to the parable of the sheep and the goats. It doesn't matter how many times you say "I believe in Jesus" in church if you mistreat your fellow man.