Mohammad (pbuh) was known for his kindness, honesty, and good & straight manners among the meccans. He never told a lie and never broke a promise.
At age Forty, Mohammad (pbuh) had his first close encounter with Angel Gabriel inside "Hera Cave" at Mount Hera. The Infidels always argued: "what did Mohammad bring down from that mount?". The Infidels followed him everywhere he went, in and outside Mecca, and they stalked him and his followers for 13 years without a single argument stating that Mohammad (pbuh) was learning/teaching Christianity or Judaism. Then again, he lived another 10 years in Medinna without such accusations too.
What makes us strongly believe that Prophet Mohammad (pbuh) is telling the whole truth, is the fact that his Message is wealthy with an exclusive Scientific facts that many people in his time couldn't even figure out. Remember now, we are talking about a Forty year old man lived in Arabia in the middle of the desert and who never worshipped anything in his life, was illiterate and never known for possessing any scientific and Medical knowledge whatsoever, and yet, he revealed scientific and medical facts that are discovered in the 20th century....Now, none of the previous Prophets brought forward such exceptional facts.
We will outline many facts revealed to Prophet Mohammad (pbuh) in the Holy Qur'an 14 centuries a go, and since there is plenty of facts to bring about, we are listing them in several groups for easy access:
Once you've gone through the groups above, ask yourself this question: " Why did Mohammad (pbuh) mention such facts? and where did he get the information from?. Both Christianity and Judasim don't have such data. Mohammad (pbuh) didn't go to a college and never visited Nasa Space Center, so where did he get the facts from.........the answer: from the Almighty Allah (SWT).