The next sentence of "there is no hurdle that can't be crossed" is "there is only a bend that can't be turned".

"There is no hurdle to cross, only a turn" is a proverb of unknown origin, which is explained as follows:

There is no hurdle: no danger can really knock a person down, and all difficulties can be overcome;

There is only one corner that we can't turn: our strongest enemy is ourselves. If a person can't beat himself, it will be difficult to cross that hurdle and overcome difficulties.