My house is from 1920. All the wiring is BX Cables just balck & white, no green / ground cable. The box is grounded to the water waste pipe in the basement.
As I am installing new lights fixtures & outlets (with a ground cable), how am I supposed to ground them and keep it all safe.

Hereis what I read here:

" BX Armored cable: A flexible steel sheath covers hot and neutral wires, which are insulated with cloth-covered rubber. The sheath provides a ground, so grounded receptacles are easy to retrofit."

Should I then attached the ground cables fron the new fixtures to the box which connected to the cable will ground it?