Do I need to put comma in this place at the sentence?

Question

The sentence is:

"A line is composed of a lot of points. From now on(,) this point we call “one dimensional”

The options are:

1) "A line is composed of a lot of points. From now on, this point we call “one dimensional”

2) "A line is composed of a lot of points. From now on this point we call “one dimensional”

Answer 1

Commas are usually best used only when they clarify things. In this case I would use a comma.

So the first option (using a comma):

A line is composed of a lot of points. From now on, this point we call “one dimensional."

The following was part of my answer before the OP was edited:

{First, singular count nouns such as line almost always require a determiner. In most cases this will be an article. Thus, in standard English it will be A line... when talking about a typical line.}