You have to be daring/ambitious/influential/tough to be successful in politics. You cannot be soft.
tough
Joe is very ambitious/fearless/passionate/charming about baseball. He likes it very much.
Passionate
having very strong feelings or emotions
passionate
doubting that something is true or useful
sceptical
strong; not easily broken or made weaker
tough
pleasant and attractive
charming
He's very passionate /humble/ determined/ courageous about his success. He doesn't like to talk about it
humble