What is the most important thing?

I don’t know, we’re all connected, everything depends on other things.

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Is the engine the most important part of a car? Well without gas it won’t run.

Is the Brain the most important part of the body? Heart beats, mouth eats, lungs breathe… take any single one away and you die.

Dev skill, language or framework mastery is important? Communication, politeness, problem discovery, social dynamics more important ?

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I think of important things as glass panels: light shines outside, you want to have some light inside, and we have many panels in between.

If any of these panels lets 0%~10% of light pass, other panels can be crystal-clear, but you will live in the dark.

If every panel lets 90% of light pass, but you have many layers, you will live in the dark too.