Dr. Camilo Cruz uses a powerful metaphor to explain why many people never reach their full potential. In the story, a wise teacher and his student visit a poor family whose only possession is a single cow. The cow provides just enough milk to keep them alive, but it also keeps them trapped in a cycle of "just enough."
Thinking you aren't "smart enough" or "talented enough" to succeed.
Blaming the economy, your parents, or your boss for your lack of progress.