Your thoughts are not inside your head. Space and time are not fundamental, information is. Consciousness creates apparent space and dimensionality. Just like when you have a dream, what you are dreaming takes up no space. Your consciousness creates the illusion of space and dimensionality when you dream, the same as when you are awake. Both are information based simulations of physical realities.
The greatest saint, even if he has sacrificed a thousand times all that he held most dear, even his life itself, for love of others, for that of a God, or for a noble ideal, remains a prisoner of death and rebirth if he has not understood that all is a childish game, empty of reality, a useless illusion of shadows which his own mind projects on the infinite screen of the Void.