“Music is your own experience, your own thoughts, your wisdom. If you don't live it, it won't come out of your horn. They teach you there's a boundary line to music. But, man, there's no boundary line to art.”

Old Town Folks (1869) Ch. 39 (p. 507) Sometimes paraphrased: "When you get into a tight place and everything goes against you, till it seems as though you could not hang on a minute longer, never give up then, for that is just the place and time that the tide will turn." and "Never give up, for that is just the place and time that the tide will turn".
Context: When you get into a tight place, and everything goes against you till it seems as if you could n't hold on a minute longer, never give up then, for that 's just the place and time that the tide 'll turn. Never trust to prayer without using every means in your power, and never use the means without trusting in prayer. Get your evidences of grace by pressing forward to the mark, and not by groping with a lantern after the boundary-lines, — and so, boys, go, and God bless you!

Connections (1979), 10 - Yesterday, Tomorrow and You
Context: The question is in what way are the triggers around us likely to operate to cause things to change -- for better or worse. And, is there anything we can learn from the way that happened before, so we can teach ourselves to look for and recognize the signs of change? The trouble is, that's not easy when you have been taught as I was, for example, that things in the past happened in straight-forward lines. I mean, take one oversimple example of what I'm talking about: the idea of putting the past into packaged units -- subjects, like agriculture. The minute you look at this apparently clear-cut view of things, you see the holes. I mean, look at the tractor. Oh sure, it worked in the fields, but is it a part of the history of agriculture or a dozen other things? The steam engine, the electric spark, petroleum development, rubber technology. It's a countrified car. And, the fertilizer that follows; it doesn't follow! That came from as much as anything else from a fellow trying to make artificial diamonds. And here's another old favorite: Eureka! Great Inventors You know, the lonely genius in the garage with a lightbulb that goes ping in his head. Well, if you've seen anything of this series, you'll know what a wrong approach to things that is. None of these guys did anything by themselves; they borrowed from other people's work. And how can you say when a golden age of anything started and stopped? The age of steam certainly wasn't started by James Watt; nor did the fellow whose engine he was trying to repair -- Newcomen, nor did his predecessor Savorey, nor did his predecessor Papert. And Papert was only doing what he was doing because they had trouble draining the mines. You see what I'm trying to say? This makes you think in straight lines. And if today doesn't happen in straight lines -- think of your own experience -- why should the past have? That's part of what this series has tried to show: that the past zig-zagged along -- just like the present does -- with nobody knowing what's coming next. Only we do it more complicatedly, and it's because our lives are that much more complex than theirs were that it's worth bothering about the past. Because if you don't know how you got somewhere, you don't know where you are. And we are at the end of a journey -- the journey from the past.

PENN Address (2004)

Gut Symmetries (1997)
Context: They were letting off fireworks down at the waterfront, the sky exploding in grenades of colour. Whatever it is that pulls the pin, that hurls you past the boundaries of your own life into a brief and total beauty - even for a moment - it is enough.

Source http://www.examiner.com/article/cinematic-melodies-elegy-by-lisa-gerrard

Clary and Jace, pg. 172
The Mortal Instruments, City of Bones (2007)

Source: Alexandria Symonds, " Bonnie Wright http://www.interviewmagazine.com/film/bonnie-wright," at interviewmagazine.com, June 21, 2011; In response to the question: "Do you think playing Ginny for so long made you more like her?"