Gobind v. State of M.P., (1975) 2 SCC 148

Mathew, J. “There can be no doubt that the makers of our Constitution wanted to ensure conditions favourable to the pursuit of happiness. They certainly realized as Brandeis, J. said in his dissent in Olmstead v. United States, 277 US 438, 471 the significance of man’s spiritual nature, of his feelings and of his intellect and that only a part of the pain, pleasure, satisfaction of life can be found in material things and therefore they must be deemed to have conferred upon the individual as against the Government a sphere where he should be let alone.”