Latter-day Saints understand this to mean that, except when introducing the Son, God always acts and speaks to mankind through Jesus Christ. Accordingly, the Father has placed his name upon the Son, authorized and empowered him to speak even in the first person for him, as though he were the Father. From Mary, his mother, Jesus inherited mortality, the capacity to die. Christ is also Father in that he spiritually received all that the Father has. Other explanations are likewise possible.
All persons have multiple roles in life.
These titles describe roles or functions at a given time, as well as relationships to others. For Latter-day Saints, this is so with the Christ. He has many names and titles. He ministers as both the Father and the Son. One who begets or gives life.