This is correct and no one should take the word of another
unless first "testing everything" (what might be received anyway; not what is rejected or ignored or not of God).....
Years ago the only source I could find that was/is/always trustworthy was/is/always Scripture as the Father makes known/reveals. Man does not live by bread alone, but by a steady stream of words from the Father and only He is able to lift the veil, to breath upon as 'pneuma', to give understanding and wisdom.
John 14:26 But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
1John 4:1 Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
1John 4:2 Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God:
1John 4:3 And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.
1John 4:4 Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world.
1John 4:5 They are of the world: therefore speak they of the world, and the world heareth them.
1John 4:6 We are of God: he that knoweth God heareth us; he that is not of God heareth not us. Hereby know we the spirit of truth, and the spirit of error.