In some of Paul's writings, he maintains that his teachings have the authority of God the Father and Jesus Christ. But in 1st Corinthians 7:25, Paul specifically states that his next advice comes not from God, but his attempt to use his own wisdom. Did Paul intend for his readers to view this section in 1 Corinthians as having less authority than what he normally expected his readers to assume?
And if Paul considered his own writings Scripture (as Peter perhaps did), would this indicate that Paul believed - contrary to the Letterism school of Biblical fundamentalism, which teaches that every word of the Bible is to be considered the word of God, specifically and intentionally placed there - that some parts of Scripture were not to be taken as the inspired word of God?