As someone in the Telegraph has written, SA look unusually vulnerable. 4th captain in 18 months, a good but not spectacular bowling line up and a soft batting line up.
Having said that, England's bowling is suspect too but there batting should be able to carry them. Cook, Root, Bairstow, Ali (if used correctly) and Stokes instill some confidence in me.
I can accept failure...I can not accept not trying again.