2:1 on a flush draw??

[skitzo444]

I was rereading a poker book and it said when you flop a 4 flush you will make it about 30% of the time giving you odds of aprox. 2-1. This means that if the pot size is double the BB after the flop it is correct to chase?? It seems like the pot will always be this big, and assuming the pot is 2 big on the turn it is still correct??