a sub-4 minute 1 mile run used to be impossible, until it wasn't.

a sub-10 seconds 100m sprint used to be impossible, until it wasn't.

a 500kg deadlift used to be impossible, until it wasn't.

all this means that humans are limiting themselves more by simple belief that something is not possible instead of actual reality they live in.

i think this goes for any aspect of life. whether it is business, sport or anything else. we can do much more if we start believing in ourselves more.