Forces of gravity will be totally invisible to you.

The force of gravity is a strong but unchanging force that influences absolutely everything around you.

Because it never changes, you don't get to see what happens without it; it intuitively feels like some background thing you can safely ignore.

But that force of gravity might have huge determinant power if it ever changes!

You can only say a thing doesn't appear to matter if you have seen how the system changes when that input varies.

Forces of gravity can change. And when they do, watch out! All kinds of completely bonkers things will happen that you literally can't understand.