INFPs and INFJs are very similar. They’re both idealistic, moralistic, and empathic. It’s not uncommon for INFPs to mistype as INFJs, and vice versa.
Podcast — Quiet: The Power of Introverts with Susan Cain
Susan Cain explains why she thinks shyness can be a “civilizing force” in our self-promoting culture: http://www.quietrev.com/susan-cain-quiet-podcast/#7
Quiet by Susan Cain
16 Quotes About Love That Only Introverts Will Understand
"Introverts are capable of acting like extroverts for the sake of work they consider important, people they love, or anything they value highly."
A powerful ted talk about the power of introverts given by Susan Cain. An introvert herself who speaks about her wish for introverts "the best of all possible journey's and the courage to speak softly".