Quiet is a condition in which there is no restlessness or disturbance.
Calm is a still, unmoved condition which no disturbance can affect—it is a less negative condition than quiet.
Peace is a still more positive condition; it carries with it a sense of settled and harmonious rest and deliverance.
Silence is a state in which either there is no movement of the mind or vital or else a great stillness which no surface movement can pierce or alter. <ref>http://incarnateword.in/cwsa/29/quiet-and-calm#p1,p2,p3,p4,p5,p6,p7,p8,p9</ref>