How does Holden think differently than he acts? Use examples and a quote.

Holden Caulfield is one of literature's most celebrated unreliable narrators and continually displays his hypocritical, unreliable nature by saying one thing and doing the exact opposite. In chapter 3, Holden tells the reader that he reads often and that Ring Lardner is his favorite author after his brother. Holden also mentions that he was surprised to discover that Isak Dinesen's Out of Africa is actually a good book after he was forced to read it in class. Holden then illustrates his unreliable nature by commenting, "I’m quite illiterate, but I read a lot" (Salinger 11). This statement makes no sense and is completely contradictory.
Shortly after Holden's roommate Stradlater returns home from his date with Jane Gallagher, a girl Holden genuinely cares about, Holden takes a swing at Stradlater and says,

I was going down to the can or something, and then I tried to sock him, with all my might, right smack in the toothbrush, so it would split his goddam throat open (Salinger 26).

Holden's punch glances off Stradlater's head, and he ends up losing the fight. At the end of chapter 7, Holden once again illustrates the inconsistency between his thoughts and actions by saying,

I’m a pacifist, if you want to know the truth (Salinger 28).

There are numerous more examples of the inconsistency between Holden's thoughts and actions as the novel progresses, and he continues to prove that he is an unreliable narrator.