I was reading this post the other day, and came across a comment by user DoubleAA who stated in the comments something to the effect of "if the only reason you believe is because of the Kuzari argument of our unbroken mesora, I feel sorry for you". Which got me thinking: What, then, is the better argument for belief in Torah MiSinai? Specifically, what is a proof that doesn't have the same problems as the Kuzari's argument?
main thing is to accept the mesora of our elders as explained in the intro to chovos halevavos, but if you want to delve in chakira and have proper guidance and are motivated to strengthen your faith then:
First thing that should be clear is that G-d exists. This can be demonstrated either through logical inquiry or more safely through studying the divine wisdom in nature. (the extreme complexity underlying all life and that a bounded random process could not possibly have produced such mind boggling complexity. i tried to prepare something here for whatever its worth)
Once this is clear and we are certain that He designed our bodies with an infinite wisdom, then it must also be that prophecy is necessary for Him to tell us what this is all about and this leads us to the most popular book on the subject, which has been translating into more books than any other book, and which is the mother of all monotheistic religions. then we also notice that this book bears the same marks of infinite wisdom as in nature, and we also notice the unique cultural survival of Judaism as pointed out by Rabbi Becher here, and the prophecies in the torah having been fulfilled, etc.
here's also a relevant quote from the pas lechem commentary of chovos halevavos shaar yichud ch.7
(Pas Lechem: He began with the title: "powerful" because according to our understanding, He existed before everything, since immediately after we grasp that there exists a Creator who created the world from nothing, we will immediately recognize His power, namely, the act of creating something from nothing...After this, when we reflect on the details of creation, and we study them and their parts - we will see signs of His wisdom and we will know that He is wise. Afterwards, we contemplate His providence in governing the world, we will know that He is living and among us always. Understand that all of these descriptions are obligatory and follow one after the other, with the creation of the world as their first source)
Belief can come from a personal revelation. A good friend of mine was planning to commit suicide on our way home from school in 10th grade. He asked of God that a particular song on play next on the radio if God cared and did not want him to kill himself, and that song came on.
Belief can come from instinctive conviction and commitment. This past year a good friend and I carpooled with a very smart, very skeptical Jew, who very methodically and academically ripped any rational argument for judaism to shreds, and called in to question the whole validity of the Torah. My friend had a serious crisis of faith after one ride. God suddenly be came a demiurge, an opiate of the masses, and a passing fantasy in man's search for meaning, alongside his Omnipresent self. He began to cry, and swore with God's name, and heaven and earth as his witnesses that he would be a jew and uphold Judaism were he the last jew a live, standing before a firing squad, who would spare him if he forsook Judaism, in the face of undeniable evidence of its fallaciousness.
Belief can be a rational choice, based on experience. One can choose choose Judaism because, having studied the Torah they cannot deny that it improves my life and character, and they feel that the set of rules it lays out for mankind, if properly enforced, would do the same for the world.