Timbre is also known as the tone quality or the tone color. When singing or playing an instrument you can change the timbre at will and thus affect the composition or the song itself. The perceived timbre depends on the physical quality of the sound, so if you know how sound works you can affect the timbre in any way that you want.
In common sense, Paine suggested that American independence from Britain was an absolute necessity, since he thought it was absurd for such a small island to rule over such a vast territory.