Things can fall apart, or threaten to, for many reasons, and then there's got to be a leap of faith. Ultimately, when you're at the edge, you have to go forward or backward; if you go forward, you have to jump together.
Other quotes by Yo-Yo Ma
The role of the musician is to go from concept to full execution. Put another way, it's to go from understanding the content of something to really learning how to communicate it and make sure it's well-received and lives in somebody else.
There are limits to how much sound a cello can make. That's part of the framing of acoustical instruments. Finding what those limits might be, and then trying to suggest perhaps even the illusion of going beyond is part of that kind of effort.