Sanskrit: बाह्ये निरुद्धे मनसः प्रसन्नता मनःप्रसादे परमात्मदर्शनम् । ्मिन्सुदृष्टे भवबन्धनाशो बहिर्निरोधः पदवी विमुक्तेः 
English:  When the external world is shut out, the mind is cheerful, and cheerfulness of the mind brings on the vision of the Paramātman. When It is perfectly realised, the chain of birth and death is broken. Hence the shutting out of the external world is the stepping- stone to Liberation.