When you're a carpenter making a beautiful chest of drawers, you're not going to use a piece of plywood on the... — Steve Jobs

When you're a carpenter making a beautiful chest of drawers, you're not going to use a piece of plywood on the back, even though it faces the wall and nobody will ever see it. You'll know it's there, so you're going to use a beautiful piece of wood on the back.

Author: Steve Jobs

Insight: There's something quietly radical about caring for the parts of your work that no one will see. We live in a culture obsessed with appearances and reputation, where the invisible stuff—the rushed corners, the cheap materials hidden behind closed doors—feels like smart shortcuts. But Jobs is pointing at something that actually affects you, even if it doesn't affect your audience. When you know you cut corners, something shifts inside. You carry a small weight of inauthenticity. Conversely, when you build things well all the way through, you develop a different relationship with your own work. It becomes integrity rather than performance. This matters most in the areas where no one's watching: how you treat a friend when you're tired, how carefully you do tasks that bore you, the quality of your thinking when you're alone. The counterintuitive part is that this invisible standard actually shows through, even when people can't point to why. Craftspeople know their own work, and that knowledge shapes confidence, attention to detail, and ultimately what they create next. You can't fake caring about the back of the drawers for very long. Eventually, you either believe in what you're making or you don't—and everyone feels the difference.

Source: Walter Isaacson, Steve Jobs, p. 522, 2011