Como dizer "Se não é uma coisa é outra" em inglês

There is always an excuse.

Related to it:

If you don't want to do something, one excuse is as good as another. (Yiddish Proverb)
If you want to do it, there is a thousand of ways; if you don't there are thousands of excuses. (Chotu Dhiman) I tinkered the quotation a bit, though...

You can make excuses or you can get the job done, but you can't do both. (Hap Holmstead)
Don't make excuses. Make things happen. (Doug Hall)
Put all excuses aside and remember this: YOU are capable. (Zig Ziglar)
You can make excuses or you can make progress. You choose. (Brian Tracy)
If you really want to do something, you'll find a way. If you don't, you'll find an excuse. (Jim Rohn)
Today's excuses are tomorrow's regrets dressed in disguise. (Steven Furtick)

Source:
Ref. wiseoldsayings
An excuse is worse and more terrible than a lie; for an excuse is a lie guarded. (Alexander Pope)

This reminded me of the "quando não é uma coisa, é outra! ", problemas, problemas...

Ref. theidioms

But to every cloud, there's a silver line, don't despair. Soon you will be saying "two beers or not two beers, that's the question!." Relax.

It happens! More often than we would like; human beings aren´t machines after all, he hee.

Obrigado por me lembrar dessa frase, eu tinha esquecido totalmente da frase "Quando não é uma coisa, é outra!"