Oh my god, how i love this topic... Its not that i´m a mainstream preacher. And yes we´ve been lied to our whole life.
But a flat Earth? Really? On the image of torronto you can even see the drop in height with your bare eyes!
I dont really wanna start an indept discussion here but, i just want you to think about one thing. Have you ever (i have!) witnessed a sunset or rise on a beach? There you have it! The Sun sinks into the sea till its gone. But after that there is still enough light arround to see for few hours or so..
How would anyone like to explain this, other than with: "We live maybe on a big sphere?" I´m really curious to know...