I read His words that He gave us via His disciples found in the Holy Bible.
"Remember the word that I (Jesus) said unto you, The servant is not greater than his lord. If they have persecuted me (Jesus) , they will also persecute you; if they have kept my (Jesus) saying, they will keep yours (Disciples) also. (John 15:20)
Now the Disciples themselves confirmed Paul as an apostle speaking on behalf of God.
"And account [that] the longsuffering of our Lord [is] salvation; even as our beloved brother Paul also according to the wisdom given unto him hath written unto you; As also in all [his] epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as [they do] also the other scriptures, unto their own destruction. Ye therefore, beloved, seeing ye know [these things] before, beware lest ye also, being led away with the error of the wicked, fall from your own stedfastness." ( Disciple Peter)
I don't know what voices your are hearing in your head, but if these voices are telling you anything contrary to what the Disciples have said then they are demons deceiving you and you need to pray God to cast them away from you. Surely you do not want to be seen as one of these Peter speaks of here - being led away with the error of the wicked.