“My Father and I are one” (neuter in Greek), one thing, not one Person. The sense is that they are in perfect agreement, hand in glove. The relationship of unity is predicated of true believers in John 17:11, 22 and so the statement in 10:30 has nothing whatsoever to do with a unity in the Trinity. Jesus endorsed the unitary monotheism of his Jewish heritage (Mk. 12:29; Jn. 17:3, etc.). This text is not remotely connected to the idea of “one philosophical essence.” 1 Cor. 3:8 shows that those who “plant” and those who “water” for the Gospel are one.
Buzzard, Anthony. The One God, the Father, One Man Messiah Translation: New Testament with Commentary. Purchase on Amazon