Listening to Yourself
The hardest signal to detect through the noise, both inside your head and outside in the world around you, is the signal of your own voice.
Many of us leave this Earthly existence without ever hearing, much less following, that voice. Which is why we both admire and are afraid of those people who can hear their own voice and then ruthlessly follow it.
Hearing your own voice starts with knowing yourself, continues through determining intentionally what voice you will follow, and then testing all the external noise against those metrics.
Going against the flow, the crowd, or the yammering mob, this takes courage. And courage has always been in short supply.