God exists, he sent his Son, Jesus Christ, to this earth to die and atone for our sins.
The Holy Ghost is the third member of the Godhead, the Testifier of Truth.
The Bible and The Book of Mormon are the word of God here on earth today.
We also have a prophet who's words are just as powerful and as important to us as the two previously mentioned books, His name is Thomas S. Monson, He truly speaks with God and directs us on how we should live righteous successful lives.
Joseph Smith lived and died as one of the most reviled men in the history of the world, but every single thing he said and did while acting as a prophet of God is truth.
These are the things that I now know, and this knowledge has and will forever change my life.
I bear witness of these things as a missionary, serving under the command of the Most High God, in the Czech and Slovak Republics, in the name of my Lord and Savior, even Jesus Christ, Amen.