A poem and a thought with a side of athiesm

Dante Gabriel Rossetti wrote one of my favorite poems ever. This puts them right up there with people that I would have liked to have met one and thank for their creativeness. The poem is below if anyone is interested:

I HAVE been here before,
But when or how I cannot tell:
I know the grass beyond the door,
The sweet keen smell,
The sighing sound, the lights around the shore. 5

You have been mine before,—
How long ago I may not know:
But just when at that swallow’s soar
Your neck turn’d so,
Some veil did fall,—I knew it all of yore. 10

Has this been thus before?
And shall not thus time’s eddying flight
Still with our lives our love restore
In death’s despite,
And day and night yield one delight once more? 15

Thanks to Google, I was given a quote by the author of this poem.
"The worst moment for the atheist is when he is really thankful and has nobody to thank."

First I love that poem, it has been a favorite of mine for years. The quote is what I want to address. When I am thankful for something usually there is someone to thank directly. But once in a while what seems like a miracle or the byproducts of lucky timing, great things might happen and there is no one directly to thank. Like when, for example, you are the last person to get sold out tickets for your fave bands concert. Of course you could thank the person who physically gave you the ticket, or the manager of that person for hiring them to give you the ticket. But that really does seem a bit ridiculous, I mean they really didn't have much to do with you being the last one for the sold out concert. Of course out of courtesy, definitely thank the person giving you the ticket physically, its just a common courtesy! But who should i thank?
A theist would thank g-d, even if that theist were going to an Eminem concert, or even worse Black Sabbath or the like. but as an atheist who should I thank for giving me the last possible ticket out there. Personally, I look at the ticket, look at the name of the performer and thank them for coming to my city because I like you enough to spend money to come and see you in person. But who/ what do other atheists thank? Probably the most logical person to thank is yourself. i mean you got up, got dressed and got to work on time 5 days out of the week, you saved for the ticket, you drove there and you are the one that will always have that memory. What exactly did g-d do for you in this case? if you say that he/ she was the one that got you there just in time to grab the last ticket, well then is he to blame if your are the person right behind the person who got that last ticket? While that person is thanking g-d, are you to be blaming him for not getting you ahead of that person? No, of course not, you blame yourself for procrastinating and waiting until you knew you would be towards the back end of the line to get the tickets!

This is not to sound egotistical, but it is simply to state, thank yourself for the things you accomplish. Especially if you do them all on your own. Why give credit to an invisible man in the sky if you are the one who really put the time, work and effort into getting it accomplished. Be proud of what you did, and be especially proud if you did it all by yourself!