I read in the Book of Isaiah (Is. 56:1-8), about the foreigner joining Hashem. I asked my Rabbi briefly about this passage. He explained that the passage is probably neither about a gerut conversion or someone becoming noachide, but something called a 'ger toshav'.
So, I'm asking if some one would like to enlighten me regarding this subject. I'm sorry I can't be more specific in my question, as this is a new concept to me.
Very grateful for any answers.