The best way to describe this is by building an image for you. ..now imagine me I'm selling coffee to a guy who has his hands full and manages yo sneak his wallet to me to take the fee for the coffee. I think nothing of it in terms of meaning just that the guy is a friend who wants me to grab yhe money for him. An Fe base interjects this action which is a clue to the guys motivations...that of TRUST. He trusts me therefore he does this....external actions belie clues of internal motivations. I already trust the guy so I need no external actions or clues.