If We Could Only Discern Their Motives

 If we could judge the immigrants -- discerning whether they were being truthful -- on their reasons for wanting to come, would we let in every one that had honorable intentions?
   You want to join family members who are already here? Come. You are welcome.
   You want to bring drugs into our country? Nay, we shan't have you. Not at all.
   You have heard all your life our wonderful America is, and you just want to live here? Come, come. Our borders are open to you.
   You have heard about our welfare system, and would like a free ride? No, no. I'm afraid you better not come.
   You want to work and earn and honest living? Working is not illegal in America. Please do join us.
   Frankly, with the concern many have of who comes, it seems it would be good if it were possible for us to be so discerning, if it were possible for us to filter them out by their motives.