While focusing to big picture might set someone on right track and clear objective, something small might miss without careful attention. It’s so small that your eyes might overlook it for something else and yet it holds great and crucial role to the whole machinery.
The machine works fine but after long run, you feel something off the chart, not too much but still off. You know you miss something but you are also sure you have done well. Searching such small and yet fragile things is difficult because tinkering it wrong, the whole machine goes down. But if you do it right, your creation could function better.
Happy debugging, Everyone.