freedom of speech

i don't know the meaning of those words. i don't even know the concept of freedom.
what is it, actually? does freedom mean that you can do and say whatever you want to do and say regardless of other people's feelings, thoughts and opinion? does freedom have any limit? if so, what's the limit then?

is it alright if i say that the limit of my freedom is other people's freedom? therefore i can do and say whatever i want to do and say by considering other people's feelings, thoughts and opinion. as long as i don't bother other people's freedom, then i am free to do whatever i want. i am free to decide. oh well, i like that the concept of freedom.

ah, another question though: what about the things we don't do and say, does it also have to consider other people's feelings, thoughts and opinions? damn you, people! ftd!