Challenge
“Trying to light a match in the rain”
You do not have to use this phrase but as long as it’s the same concept. Wrote whatever, as long as it’s poetry or prose. ;)
Impossible
Trying to love someone you don't is like trying to light a match in the rain.
Trying to climb a 100-foot tree is like trying to light a match in the rain.
Trying to go the speed of light is like trying to light a match in the rain.
Trying to break into the pentagon is like trying to light a match in the rain.
It is not impossible, but improbable.