It's a fairly simple message, but with a few other undertones of other things (like most of Jack's songs).
To sit back, relax and look at things as they really are. To stop thinking so much and let them happen, to experience them instead of getting bogged down by overthinking a situation and forgetting to enjoy it.
However...he's also a filmmaker and is showing praise for a simpler time in cinema when expression was more elemental. Silent films didn't need (didn't have the option) of being complicated. They made do with the simple tools at hand and often made a better film and told a better story because of it.
It's a fairly simple message, but with a few other undertones of other things (like most of Jack's songs).
To sit back, relax and look at things as they really are. To stop thinking so much and let them happen, to experience them instead of getting bogged down by overthinking a situation and forgetting to enjoy it.
However...he's also a filmmaker and is showing praise for a simpler time in cinema when expression was more elemental. Silent films didn't need (didn't have the option) of being complicated. They made do with the simple tools at hand and often made a better film and told a better story because of it.