Iudex ergo cum sedebit,
Quidquid latet, apparebit:
Nil inultum remanebit.
When the Judge His seat attaineth
And each hidden deed arraigneth,
Nothing unavenged remaineth.
This is simply said to remind us that, no matter how well we have concealed things on earth, God knows everything : and He not only knows everything, but will consider it all in making His decision about out eternal future.