Making sense of transitive usage of 行く and 来る - 「を行く」 and 「を来る」

Question

I think it's known that some intransitive verbs can take を particle and be used as transitive verbs such as for example 「私のことを分かってくれない」. While using 分かる transitively would require specific scenarios or patterns, from the point of view of an English speaker it just naturally makes sense, for the reason that "understand" is a transitive English verb.

On the other hand, there are verbs that are naturally intransitive in both Japanese and English, that simply do not make sense to assign any noun objects, like 死ぬ and "to die". There is no way to imagine "Subject dies object", both in English and Japanese, unless if we modify it to "Subject allows/makes object to die" but that would change the main verb in question, again, both in English and Japanese.

At first I thought 行く and 来る are parts of those naturally intransitive verbs, since there is no way for "Subject goes object" or "Subject comes object". And then I found a proverb 「天馬空を行く」, which made me look up "を行く" on Google. The result? 8.75 millions results. "を来る" has 243K results which are a lot less but still a significant figure that shows that out there, 行く and 来る are used with を. However, my thought still remains, that there is no way for "subject goes object". Looking at sample usages, there seems to be a pattern of the nouns that are modified by "を行く" are roads, path etc, but imagining it in English as "to apply the act of going onto the road as the object" doesn't work to me. "を来る" does not even have any pattern that can be seen among the sample noun objects.

Examples from Google results:

• お気楽サラリーマンジャングルを行く！
• 歴史街道を行く
• 一歩先を行くPythonプログラマが読むべきOSS
• 私は私の道を行く
• 晴れの日を来る
• 遠い道を来るまでに

So, how do we make sense of 「を行く」 and 「を来る」?

Answer 1

Think of it as through.

空をゆく
'go through the sky'

ジャングルを行く
'go through a jungle'

歴史街道を行く
'go through a historic street'

一歩先を行く
'go through (a path) one step ahead'

私の道を行く
'go through my own way'

晴れの日を来る
'come through a sunny day (atmosphere)'

遠い道を来る
'come through a long road'

Answer 2

Another way to think of を in this sense is to do some action which "leaves something behind you", either literally or figuratively. Here are some additional examples:

• 公園を散歩する　→　Walk (through) the park; the park is "behind" you after you've walked through it.
• 家を出る　→　Leave home; home is now "behind" you in your time-line of activities
• 階段を下りる　→　Go down the stairs; same as walking example
• 大学を卒業する　→　Graduate from a university; you're "leaving behind" student life as you go forward into your future
• 道を通り抜ける　→　Make your way down the street; same as walking example

Answer 3

For 行く, one could think of it the way one does the transitive use of to go in English (which does exist, scroll down to the transitive definitions). One of your examples provides an easy and appropriate example of this, "私は私の道を行く". I'd put this as "I go my own road." The method doesn't always work with a literal, word-by-word translation, but it might help with pinning down the concept behind the meaning of a phrase.