How is nothing impossible but impossibility to me it it makes no sense
There is always a way around everything. There is a loophole in almost any command hence making nothing impossible while the concept of something being impossible is not possible because everything is possible.
The phrase is sort of a play on words. It's like saying "There is an exception to every rule, except this one." The saying implies that the only thing that cannot exist, is impossibility itself.
It's just a figure of speech used to inspire. Obviously some things are impossible.
Wait, can you kinda explain what you mean? Please? Oh and btw your cute.... I know it's random but yea...