What is the purpose of は here?


I have been listening to
[にじいろ／絢香](https://www.youtube.com/watch?v=ybzsKec_cW0) and started to
translate some of the lyrics but I got stuck with this part: **ずっと長く道は続くよ。**
The whole sentence is like this:

> これからはじまるあなたの物語  
>  ずっと長く道は続くよ  
>  にじいろの雨降り注げば  
>  空は高鳴る

My question is: What is the purpose of the **は** here? What I know about は is
that we use it to introduce the topic. So if the **長く道** here is the topic,
and **続く** is the verb, what exactly did it do to the topic since we use **は**
instead of を which I learned that we use with verbs.




続く is an intransitive verb. It doesn't take an object and so doesn't take the
particle を. This verb is used when something continues without an explicit
agent i.e

> いい天気はつづく  
>  The good weather continues

Nobody continued it. It just continued on its own.

The equivalent transitive verb is 続ける. This is used when somebody is actively
continuing something and requires an object marked by を:

> 話を続ける  
>  I continue my story.

Japanese has many of these transitive/intransitive verb pairings.

So in your example, the road (the topic) continues. If you used 道を続ける that
wouldn't make much sense. Not sure about Japanese but if you 'continued the
road' in English that would imply that you were still building it.




続く is an intransitive verb. It doesn't take an object and so doesn't take the
particle を. This verb is used when something continues without an explicit
agent i.e

> いい天気はつづく  
>  The good weather continues

Nobody continued it. It just continued on its own.

The equivalent transitive verb is 続ける. This is used when somebody is actively
continuing something and requires an object marked by を:

> 話を続ける  
>  I continue my story.

Japanese has many of these transitive/intransitive verb pairings.

So in your example, the road (the topic) continues. If you used 道を続ける that
wouldn't make much sense. Not sure about Japanese but if you 'continued the
road' in English that would imply that you were still building it.

