English is not much of my first language, so I apologise for that first.
I’ve search around on Google, and notice that it’s sort of a Dutch Proverb, but not much explanation about what it means.
May I please know what this quote mean?
It means that even when something is very steady (four feet firmly planted on the ground), it can still be unstable at times. The implication is that a firm foundation isn’t always enough, even though it’s a very good start.