I know they have only one answer that they dont know anything...but still we cant stop.
Whatever happens tomorrow we are unaware of of it but in future we wont regret that we din give it a try...
There's a famous doha in hindi, had learnt it in school,
''karat - karat abhyas ke jadmat hot sujan
Rasri awat jate te, sil par parat nissan''
It means that Practice/lot of hard work can make a thick brained fool become an intelligent person.
Just like a soft rope, when rubbed continuously on a stone makes a mark on it.
Same way we should keep trying...somewhere we have made a small mark...but we should make it a bigger one.
There's nothing wrong in keep trying.