The only child of God, according to the reference provided, is Jesus Christ.
The provided reference explicitly states that Jesus Christ is called the "Only Begotten Son of God." This indicates a unique and singular relationship with God the Father. The reference further explains that Jesus inherited divine powers from His Father and mortality from His mother, Mary.
Here is a breakdown:
- Divine Heritage: Jesus received divine power from his Father, God, making him distinct.
- Mortal Heritage: Through his mother, he was subject to human experiences such as hunger, thirst, and death.
- Only Begotten Son: The reference directly names Jesus as the 'Only Begotten Son,' highlighting his unique position as the single child of God.
The concept of "only begotten" implies a singular and special relationship, distinguishing Jesus from all other beings.
Therefore, based on the information provided, the answer remains that **Jesus Christ** is identified as the only child of God.