OOBE, skill or requierment?

[Kazbadan]

I wish i could know it....

But before you do something, you must believe very strongly in obes. That´s the most basic thing to achieve. After that you must pratice very well...i suppose!

[Yoko]

Is an oobe somthing achived through just knowing how to do,or is there somthing within us that has to click befor we can do it successfully at will?