Sentence examples for challenging but from inspiring English sources

It's challenging but exciting.

Very challenging, but worthwhile, in my opinion.

It's challenging, but it's fun.

Very challenging, but also very rewarding.

Calculating climate risks is challenging but feasible.

It's challenging but actually very liberating.

A challenging – but never stressful – puzzler.

"It will be challenging but not impossible".

This is very challenging, but achievable.

"It's all very challenging, but not impossible.

This should feel challenging but not painful.