Ah, I've heard this quote before. I first saw it about two years ago
in webcomic form. Then, I saw the video you posted about a year ago. It's a really inspiring quote.
The funny thing is, I'm actually doing the "huge volume of work" Glass recommended right now: I do one song every week. I didn't realize it at the time, but perhaps I was subconsciously inspired by Glass' words.
Doing a "huge volume of work" actually does work, guys! First of all, there's the actually improvement factor-- the most complicated drum in my first weekly song was 4 kicks in a row. Now, the most complicated drum pattern in one of my more recently weekly songs,
Fusion Beat, is something that would take up a couple lines in trying to explain-- and possibly bore you guys in the process.
4 kicks isn't THE drum beat of the song anymore-- it's one of many elements of the beat. And I'm just talking about drums, which used to be my main weakness. Not anymore.
That's not to say that I'm done learning things about drums and getting better with them-- I'm just looking back on how far I've come, and I feel satisfied with how much I've been able to do so far.
And secondly, doing a "huge volume of work" is actually kind of motivating. When I first started my weekly songs, I would work on them for just a little bit, and would end up staying up really, really late the day before the end of the week in order to finish it before the week was up. Now, I work at a much better rate, starting a new song maybe a day or two after finishing a different one. And I'm having a lot of fun doing it; music is amazingly fun.
Although what truefaiterman and LWR said definitely holds true-- as you get better, you'll raise the bar higher. This is definitely a good thing, guys-- it means you'll keep on improving.