"It is indeed the mind that is the cause of men’s bondage and liberation. The mind that is attached to sense-objects leads to bondage, while dissociated from sense-objects it tends to lead to liberation."
–Amrita-Bindu Upanishad- (1. Hindu)
"The Kingdom of Heaven is within."
"And again I say to you: It is easier for a camel to pass through the eye of a needle, than for a rich man to enter into the kingdom of heaven"
"Congratulations to the poor, for to you belongs Heaven's kingdom."
-Jesus- (2. Gnostic/Christian)
"Leaving behind the path of darkness and following the path of light, let the wise person go from home to a homeless state, in retirement looking for enjoyment where enjoyment seemed difficult. Letting go of all pleasures, calling nothing one's own, let the wise cleanse oneself from all the troubles of the mind. Those whose minds are well grounded in the elements of enlightenment, who without clinging to anything find joy in freedom from attachment, whose appetites have been conquered, and who are full of light, they are free in this world."
"The thoughtful exert themselves; they do not delight in a home; like swans who have left their lake, they leave their house and home. Those who have no accumulations, who eat properly, who have perceived release and unconditioned freedom, their path is difficult to understand, like that of birds in the sky."
-The Buddha- (3. Buddhist)