Code as an English Garden

I heard a quote recently I really like: "Computer code is more like an English garden than a stone sculpture. It must be tended to and pampered, or it will be overcome with weeds and die." This goes back to an earlier quote, "Creating an agile team begins with an agile codebase."  An agile codebase, by necessity, must be tended to.  Cruft must be re-factored, tight couplings must be loosened, and complexity must be encapsulated.  It's a constant, ongoing, and never-ending endeavor.