Setting off long quotes is helpful, but I think they shouldn’t be longer than a couple paragraphs: the greyed out text can become visually taxing, like italics, if overused. You can also center a profound bit of wisdom, such as this one from 365 Photos Later:Practice makes perfect.
Small recommendation: it looks like you're using a preformatted text block for your "Practice makes perfect" paragraph, but a block quote (like what I've used above to quote your text) would be more appropriate. 🙂
Block quotes (the button with the quote icon in Cake's formatting toolbar) are great for the purpose you describe, but preformatted text blocks are meant for things like sharing blocks of software code or old-school ASCII art or other things that require a fixed-width font and no automatic wrapping.