Matthew 7:15-20
Beware of false prophets, which come to you in sheep’s clothing, but inwardly they are ravening wolves. Ye shall know them by their fruits. Do men gather grapes of thorns, or figs of thistles? Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit. A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit. Every tree that bringeth not forth good fruit is hewn down, and cast into the fire. Wherefore by their fruits ye shall know them.
When people talk about their words come from God we have to take a hard look at what the words say. There a lots of people in this world that God works with and gives his words to, but there are more that this is not the case. We need to look at the words from these people and then compare them to the world of God that we already have. Only then can we take those words as from God.