Direct Answer Based on Chuck’s emphasis, the sun–ray illustration most directly communicates both unity (the ray is truly “sun/light”) and source/order (the ray has its origin in the sun), while still keeping distinction. Using it in evangelism would push you to clarify that “Son of God” does not mean God physically produced a child with a woman or that the Father “became” the Son, but that the Son eternally “proceeded from the Father” and was “sent by the Father,” while sharing the same divine nature.
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