66.4Observe the famous voice leading

Take:

C of Dm7.

Move to:

B of G7.

Stay:

B into Cmaj7.

So:

C → B → B

Now other guide tone:

F of Dm7.

Stay:

F over G7.

Resolve:

F → E on Cmaj7.

So:

F → F → E

That is the harmonic engine.