Thank you so much for explaination in details!

Wow, I haven't heard this song in years! A friend of mine used it in his wedding video. These are poetic/metaphorical, so there can be many interpretations if the songwriter had not provided one. I'm mostly a prose kinda guy, but this is my guess: "Well open up your mind and see like me" - 'look at things from my point of view/perspective' "Open up your plans and damn you're free" - back in the 2000s (when this was written) and prior to. When men asked women out (to go on dates), they two would check their calendars to see if they had free time to meet. This was when the era of smartphones started to pick up. "Damn" is an expletive, you say that when you're surprised. In most cases, you say it when you are unpleasantly surprised, but in this case, he's happy to be surprised that the girl has free time. Unfortunately, to my great shame, I cannot translate it to Chinese. I'm Chinese, but I only speak English and barely passable French :).