We hold on too long to peoples words. The thing is, people talk a lot of shit. More often than not they haven't the slightest clue on who they are, they'll speak in sentences to fill the void, but will have no real understanding about Writing any chapters.
The heart is the infinite, divine part of you (your spirit). Your spirit knows who you are and what you're here to do. The heart is your inner knowing, the part of you that transcends mere emotions or intellect and sees and knows the path you need to follow.