Hakol Hevel

As I was davening on Yom Kippur, I was looking at the words carefully as I davened and I noticed that Hakol Hevel came up a lot in different times of davening. Sometimes when I don't understand what I am reading in davening, I will read the English so I can get the full meaning and really understand what I am saying. The definition in the Artscroll English siddur for hevel, was vain. Since, we haven't fully come to an exact meaning I started thinking about what Hevel means according to the Artscroll siddur.

Dictionary definitions of vain:

• producing no result; useless
• having no meaning or likelihood of fulfillment
• without success or a result

So according to the Artscroll siddur, it means useless. Saying that everything is useless and theres is no result to anything. I thought about it some more and maybe this is far fetched, or maybe not, but like one of the commandments. Lo tisa et shem Hashem lasahv. Don't use the name of Hashem in vain. The dictionary has a different meaning for vain in this context. 

Dictionary definition to in vain

• use someone's name in a way that shows a lack of respect.

So I got to thinking some more. I thought about what we learned in class. Everything tachat hashemesh is hevel. So, in this context, I think that maybe Shlomo looks back and realizes that he lacked respect for Hashem. When he called out to Hashem, he never felt respect for Him, maybe he just saw Him as someone who is there when he needs, but He's only there when he absolutely needs something. He lacked respect. Hakol Hevel-the way he treated Hashem was Hevel.

Just my thoughts on this. What do you guys think about it?