But you can perhaps understand as much as this.

In the higher regions of finance there is very much scheming and diplomacy required.

One carries always secrets which must not be known, and one does things which it is necessary to conceal for the good of others, as well as for one's own benefit.

I have been for some years engaged in operations whose success depends entirely upon the secrecy with which they are conducted.
Naturally, there is an opposing side, there always must be.

There are buyers and sellers.