Every acting gig isn't the same, every writing job isn't the same, every live performance isn't the same - the challenge is the level of difficulty or ease, and that may vary.
The water is this marvellous blue. It’s so blue that once you see it you realise you’ve never seen blue before. That other thing you were calling blue is some other colour, it’s not blue. This, this is blue. It’s a blue that comes down from the sky into the water so that when you look in the sea you think sky and when you look at the sky you think sea.