CLEARING UP MISCONCEPTIONS ABOUT NOAHIDE LAWS
"Anyone who accepts the seven commandments, and is careful
to do them, behold, this [person] is from among the pious
of the nations of the world, and he has a portion in the World to Come (eternal life), and he is [a
person] that will accept them (the seven commandments) and do them because the
Holy [One], Blessed is He, commanded concerning them in the Instruction (lit. Torah),
and He informed us by means of Mosha our teacher, that the offspring (lit. sons) of Noah were commanded
concerning them (the seven commandments) from before hand. But if [a person] did them
[only] because it is logically appealing, he is not a resident convert (lit. 'gehr toshav'
- the legal term for one who officially keeps the Noahide laws), and he is not of the pious of the
nations of the world, but rather [he is] of their wise men."
- from the Mishneh Torah in Hilkhoth Melakhim u'Milhhamotheyham 8:14 
From the above text it appears that one is only assured eternal life, a portion in the World to Come, on
the condition that one keeps the Seven Laws of Noah due to a sincere faith in the Almighty which is inseparable from
serious obedience to His commandments. Notice that the above text doesn't just say that a person who accepts the Noahide
Laws has eternal life; rather, it states that a person who accepts the Noahide Laws AND is careful in doing them has a portion
in the World to Come (eternal life).
I know of and have heard of many many people who to some degree accept the Noahide Laws, but who at the
same time are very carefree in their knowledge of the Noahide Laws to the extent that they don't even bother looking into
the details of these commandments. Such a person's nonchalant attitude toward the commands of the Almighty reveals a
nonchalant attitude toward the Almighty Himself. I fear for a person such as this and am saddened by his state of being,
for we are not assured that he will have a portion in the World to Come. Therefore, it is necessary that when we inform
people of the Noahide Laws, that we make clear to them that their receiving a portion in the World to Come (eternal life)
is only assured on the condition that they have a faith in the Almighty that is serious toward these Noahide Laws to
the point that the individual will be careful concerning the observance of them. Such a person will not only look at
the headings of the Noahide Laws, but will also study their details.
At the same time, we can assure the individual that he is regarded as wise even if he only observes the
Noahide Laws due only to his own logical reasoning, and not out of obedience towards the Almighty, even though there is no
confidence granted to him that he will have eternal life due to keeping the Noahide Laws in this manner. Maybe
we should remind him that suicide is forbidden by the Noahide laws. Then perhaps his acceptance of the Noahide
Laws without the Almighty will lead to his acceptance of the Laws out of obedience to Him, and then without doubt
he is saved from death.