I know that Jesus Christ is His Only Begotten Son, the Redeemer of the world, who gave His life that we might have eternal life and who rules and reigns with His Father. I know that They are individual beings, separate and distinct one from another and yet alike in form and substance and purpose.
From General Conference, April 2002:
Do you think Mormons have any understand of what traditional Christians teach about the Godhead? I ask this because I recently heard a talk at an LDS Church meeting in which the speaker (an ex-Catholic) said that Christians believed the Father and the Son were one person. I don’t think your normal Mormon has any idea regarding what Christians are saying when they talk about person or being or substance.