첫 단추를 잘 끼워야 한다.

The Korean proverb '첫 단추를 잘 끼워야 한다' literally translates to 'One must fasten the first button well.' This idiom is deeply rooted in the practical experience of dressing, particularly with garments that have multiple buttons, such as traditional Korean hanbok or Western-style shirts. If the first button is mismatched or incorrectly fastened, all subsequent buttons will also be misaligned, leading to an untidy or improperly worn garment. Metaphorically, this proverb extends beyond dressing to encompass any task, project, or endeavor. The 'first button' represents the initial steps, foundations, or beginnings of an undertaking. The act of 'fastening it well' signifies the importance of meticulous planning, careful execution, and sound decision-making at the outset. The consequence of not doing so – 'all subsequent buttons will also be misaligned' – illustrates how an initial error or oversight can lead to a cascade of problems, inefficiencies, or undesirable outcomes throughout the entire process. This proverb emphasizes the critical role of a strong start in determining the overall success or failure of a larger task. It reflects a cultural understanding that foundational work is paramount and that rectifying initial mistakes later on can be far more difficult or even impossible than addressing them at the beginning. The wisdom embedded in this saying promotes diligence, foresight, and attention to detail from the very first step, acknowledging that the initial trajectory often dictates the final destination.