Joe Capitalist
Racism is a disease
It's just not believing in God; but also doing your best to follow His word.
No; because someone who is "selfish and greedy" (needs a definition) is not following His word.
The belief is not just what you will gain; but how you live your life.
Living a life of benevolence and goodwill, is part of His word and doing so, along with a belief in Him is the determining factor.
We were given free will, to make choices of good or evil (short version).
There is no easy answer and it's my opinion, that an easy answer is exactly what many people feel they need; because without the easy answer they remain unsure.
I was raised with the belief that everyone will have to answer (atone) for things they've done in their life; because none of us are perfect (free will).
A person can't help anyone else, unless they've made them self right.
They can't truly help anyone outside of their family, until they've made their family right.
And this just follows up the ladder; but we all don't have the same view of the ladder.
Off topic:
I once had some Jehovah Witnesses talking to me and in the conversation they said that if you have sinned; but never knew it was a sin, that as soon as the sin was pointed out and you stopped, then God would not hold you responsible.
I sat there for a minute and said; so if Hitler never woke up in the middle of the night and questioned what he was doing, then God won't hold him responsible.
They both looked at each other, got up, thanked me for my time, and left.
But your quote doesn't state that. Your quote advances the notion that you should believe in God (and follow his word) because of the benefits you would get from it. But shouldn't doing good be its own reward? Isn't that what charity is all about? Being generous and charitable because you know it's right, regardless of what you get in return? If someone needs a reward for doing good, it tarnishes the act, don't you think?
Also, if you have two people, one who goes to church every Sunday, prays every day, worships God every day and follows his word. The other is an Atheist but is twice as altruistic, twice as charitable, twice as magnanimous as the first one.
Which one do you believe has the better chance of receiving your "infinite gains"?