I testify that Church of Jesus Christ is true. I testify that Joseph Smith did restore the fullness of the gospel upon this earth, and that it will never be taken away again. I testify that I know that Jesus Christ died for the sins of this world. I know that it is only through Christ, through his atonement, we can join our families forever in heaven. I know that through his atonement I can be forgiven for my sins, receive the Holy Ghost as my constant companion and am not held by the chains of death.
On a more specific note, I testify of the reality of the battle between good and evil; the righteous and the wicked, fought daily in our lives. I testify that the righteous of the world are under siege by Lucifer and his followers. This is not a battle being fought in a faraway land, where the effects do not touch us. This is real, every day and in every aspect of our lives. Is it not theoretical, it is literal. The devil wishes to destroy us, to bring us misery and to pull our souls into damnation. I have had experiences that have proven this to me. His desire to kill our spirits, to deaden the communications from heaven to earth, is very real and he will fight in any way to reach his goal.
I also have a testimony of the help and strength we are given through the gospel, and through the atonement of Jesus Christ. While we are at war for our spiritual selves, we are not alone. God and Christ will never leave us to fight these battles alone. We have angels to lift us up (those seen and unseen in our lives), families to give support and love, and the very real companionship of the Holy Ghost. Never before has it been so important to do the 'Sunday School' answers; read our scriptures so we know of God and Christ, pray to our Father in Heaven so that we have open lines of communication, and attend our church meetings with open hearts and minds to learn of His teachings.
The Lord know us personally, knows our struggles and our personal battles. Rely on Him, and call on His help, as I know he will give it.
I say these things, in the sacred name of my Savior Jesus Christ, Amen.