Philippians 2:6 - Wesley's Explanatory Notes

Who being in the essential form — The incommunicable nature. Of God — From eternity, as he was afterward in the form of man; real God, as real man. Counted it no act of robbery — That is the precise meaning of the words, — no invasion of another's prerogative, but his own strict and unquestionable right. To be equal with God — the word here translated equal, occurs in the adjective form five or six times in the New Testament, Matthew 20:12; Luke 6:34; John 5:18; Acts 11:17; Re Acts 21:16. In all which places it expresses not a bare resemblance, but a real and proper equalitg. It here implies both the fulness and the supreme height of the Godhead; to which are opposed, he emptied and he humbled himself.