Nope, we all have sin, but we have something precious to help!You decieve yourself, as they decieve you and themselves (1 John 1:8).
The gift of the Holy Ghost warns people before they make grave errors. It has worked for me since I got rebaptized.
I have schizophrenia and it still gets through.
(I don't think the gift of the holy ghost was available to ancient prophets or apostles before Jesus' death).