Alma 30-31

Quote "Korihor's arguments sound very contemporary to the modern reader, but Alma used a timeless and ultimately undeniable weapon in response- the power of a personal testimony."

~Elder Jeffrey R. Holland

Question "How did Alma respond to Korihor's claim that there is no God?"

I love Alma dearly. I know that he suffered painful repentance, and that his heart was so good that it pained him to see others following unrighteous paths. After his sore repentance, he spent his entire life trying to save souls through preaching the gospel, I believe he sincerely did not desire one soul lost.
I couldn't agree more with Elder Holland's quote...we hear these same arguments today, the same things that Korihor said 70 years B.C......"...there is no God; religion imprisons you, and keeps you from truly being free; believing in Christ is just a foolish tradition....etc".
Alma responds to him in wisdom asking him point blank if he believes in God, and in Christ....Korihor responds "Nay". Alma turns the tables on him and says what proof have YOU that there is no God, and no Christ? Alma then bears strong testimony that he knows that there is a God, and a Christ also. That there is plenty of evidence not only by the scriptures and the holy prophets, but just the existence of the Earth, and all of the planets that move in regular form testify that there is a God.
Korihor says he will continue to deny God until a sign should be shown unto him. Well, Alma had an answer for that....."....thou hast had signs enough; will ye tempt your God? Will ye say, show unto me a sign, when ye have the testimony of all these thy brethren, and also all the holy prophets?.......Behold, I am grieved because of the hardness of your heart, yea, that ye will still resist the spirit of the truth, that thy soul may be destroyed. But behold, it is better that thy soul should be lost than that thou shouldst be the means of bringing many souls down to destruction, by thy lying and by thy flattering words; therefore if thou shalt deny again, behold God shall smite thee, that thou shalt become dumb, that thou shalt never open thy mouth any more, that thou shalt not deceive this people any more."
So, Alma gave Korihor ample opportunity to confess his belief in God, but it took the act of being struck dumb to humble Korihor enough to admit his lies. He ended up confessing about an angel he had seen that told him to go and preach these lies. (On a side note, I find it interesting that someone could see an angel, and the angel tells them that there is no God, and to tell everyone that there is no God.....why would an angel exist if God did not exist? Crazy, to me personally)
After Korihor confesses the truth, he wants Alma to remove his curse, but Alma is wise and basically says "no way, you'll just go out and do it again".
And so we see time and time again, men that preach against the truthfulness of the Gospel. The things that are happening today are not new or original arguments for why we should all just "eat, drink and be merry (and sleep with every person we meet)". But the truth of the Gospel of Jesus Christ has stood the test of time.....because it is TRUE! It hasn't changed. Since the beginning of time we have had a record of what the people on this earth have done, their testimonies and dealings with the Lord and His angels, and there is nothing that is ever going to remove it from the earth....no matter how bad things get....the Gospel is, has been, and always will be true!!!!