Mind is most capable of expressing itself in a fitting form. Very often man expresses his thought in any conversation that may be going on, which perhaps has nothing to do with his thought; and as his nature is, man looks for a scope for expression of his thought, and he easily gets it. In a serious conversation one can find scope for a joke, even in tragedy one can find comedy; and in comedy one can find tragedy, if one's mind happens to dwell on sad thoughts. This shows that the mind always seeks for a scope for expression, and situations outside generously offer the scope.