according to

According to X means ‘in X’s opinion’, ‘if what X says is true’.
According to Harry, it’s a good film.
The train gets in at 8, according to the timetable.

We do not usually give our own opinions with “according to”. Compare:

According to Ann, her boyfriend is brilliant. (= If what Ann says is true, …)
In my opinion, Ann’s boyfriend is an idiot. (not According to me, …)
 
• see afraid

For more information consult a good dictionary like Langman, Oxford, Merriam Webster, or Collins.