That 'it' refers to the speaker's lost mind (his or her mind is lost and nowhere to be found, but still the mind sends postcards to the speaker).
I guess
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so?
-tern2-
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06/01/2012 postreply
18:12:48
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hahaha I know, I am all talk, ha
-youknowmyheart-
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06/01/2012 postreply
18:57:42
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oh, i see. 這樣理解的確就講通了。
-tern2-
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06/01/2012 postreply
19:28:10
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現在老了。以前在中學時候對英文理解真是深透。
-youknowmyheart-
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06/01/2012 postreply
22:59:29