Government is a good subject. It did well by explaining who a citizen is and how to acquire citizenship. But Government as a subject missed something important on how to acquire citizenship; It did not talked about acquiring citizenship through death. But the bible did. See once you die here (Earth) your spirit leaves for his eternal abode prepared for it. It is either the spirit go to hell or heaven. And If the spirit go to heaven he becomes permanent citizen there. But if the spirit go to hell, he becomes a temporary citizens, until he had payed for all the evil the flesh committed on earth. Then afterwards the spirit will be transported to the Lake of fire where he becomes a permant citizen forever. Now, to acquire any citizenship listed and explain by Government, you must fulfill or have certain criteria. Like getting married to the original citizen of that country, or your mother gave birth to you in that country e.t.c. Similarly you must fulfill some criteria before you become a citizen of heaven or hell. Now the criteria for Heaven is Holiness and purity, while that of Hell is worldliness and lust. Now think about it, we humans re habitual sinners that means were citizens of hell and lake of fire after death in sin. But the truth is that God does not want us to taste two of these eternal abode. Because it is a very terrible place. That is why He sent His dear son Jesus, to die for our sins, take away our sins and give us that holiness and purity till death so as to make us citizens of heaven with Him. Where we will have everlasting joy with the saints. So now believe on Jesus and repent. So that He will take away your sins. And make you holy till death, so that you will be a citizen of Heaven