who, though he was in the form of God, did not consider equality with God something to be seized
Other versions
King James Version
Who, being in the form of God, thought it not robbery to be equal with God:English Standard Version
who, though he was in the form of God, did not count equality with God a thing to be grasped,New International Version
Who, being in very nature God, did not consider equality with God something to be grasped,