If you think she only did it for the money, you haven't even 'scratched the surface'. [=there are many other factors, reasons, etc., involved]
Despite the 'surface' differences between the two candidates, they are very similar in most ways.
The tension between them is beginning to 'rise to the surface'. [=it is becoming easy to see]
(..) Epigram: THE MEDIATOR BETWEEN HEAD AND HANDS MUST BE THE HEART! Shift change. Deep below the earth's surface lay the worker's city. As deep as lay the workers' city below the earth, (..)1927 Metropolis