Einstein's beliefs were based purely on what he observed in science and the scientific world and on scientific evidence alone, and stemmed also from believing in a deterministic universe, etc...
And Jesus had this revelation already, by the time he comes on the scene publically, it's in his words, like in the gospel of John when both spoke about and institued the trinity, etc... The Father God He spoke about was this Father God we are speaking about, Spinoza's God, etc, and He knew God in and of the OT was the Holy Spirit, etc, it's in his words/word, etc...
Jesus knew both the Spirit of God, or God the Spirit, and the Father God, it's in his word/words, if your looking for it, etc, how he distinguishes between the two, etc, knew the "Father God" was on a very much more "higher level" or plane, etc, had a 100% accurate idea of this in his mind, etc, even heard from Him or that one directly, etc, or claimed to, etc... and He knew of his own also be born of God the Spirit also, of his own immaculate conception by that (Holy) Spirit, etc, and the prophecies over him and concerning Him, that he himself was God also, but God the man or in the form of man, etc, this created a fundamental trinitarian doctrine and/or belief system, etc, because he knew of both God the Spirit here with us, and the Father God above or beyond or higher than that one, and he himself, etc, and the Father God being much higher than all or both of them, etc...
Anyway,
Anyway, it's in his word/words if your looking for it, etc...
God Bless!
I just want to say, or add, that Jesus was real historical person that really did exist in the day and time that history says he did, etc, and that almost everyone everywhere fully agrees in their being a "historical Jesus", nearly everyone does, or basically everyone does, etc, cause that much can basically be proven, etc...
But, he was also a man who performed very many supernatural acts and works, etc, miracles, etc, and these are also not a lie and is "no lie", etc... But, he did not do them, or he was not able to do them, by some kind of "undiscovered or hidden or untapped ability that was just in man only apart from God", etc, but it was by, and they were all actually only done by, the Spirit (form) of God, that was within him or was with him, etc, only by only the "Holy Spirit of God, that was also God in and of the OT, etc, that was within him (Jesus) or was with him (Jesus), etc, was Jesus, able to do any of these things at all, ever, etc...
He (Jesus) did not do them by anything he himself had in himself only or by any kind of thing he possessed more than others, etc, some kind of extra special "knowledge" or knowing, etc, anyway, they were done not by anything he had in and of himself only, or anything he had in and of himself any more so than others, etc, that he had and did, and did do, or was able to do any of those things, etc, but only by the Holy Spirit of God "proving that God and that God's existence", etc (and power and/or abilities, etc)...
So, if you believe in the historical Jesus, and you believe He really did perform the miraculous and/or perform miracles, then that pretty much proves that God in the form of the Spirit and God in the form of Man were both very, very real entities or very real beings, etc, because of the works and because of the miracles, etc, and that's how Jesus was able to do and/or perform the miracles, etc, was only by.the Spirit of God or God the Spirit only, etc... not by his own ability, but by the ability of the Holy Spirit, etc, or the God who was God in the form of the Spirit, that was also God in and of the OT... Then there is God the Father, or "Spinoza's God", etc, but besides "that one", there are the other two, or other two "forms" of Him (God), etc, that "are the two we primarily see in the Bible, primarily", etc...
Anyway, Jesus knew all of this, and has full knowing or concept and/or idea or a fundamental theology surrounding this or these mentally in his mind, etc, claimed he heard from (and fully knew) both of them, etc...
And, like he said, if you do not believe him or his words, then believe in the Spirit of God based on account of the miracles themselves only alone, if you do not believe, or cannot believe, and/or follow what he is saying or is trying to say and/or in his words or in his teachings, etc, if you can't or won't do that, then believe (or have some kind of faith) on account of the miracles themselves, etc... (and the historical Jesus that did them, etc)...
Anyway,
God Bless!