“My religion is humanitarianism, which is the basis of every religion in the world.”
quote published in Pakistan Studies Journal Pakistaniaat ( Vol. 3 No.2 of 2011 http://pakistaniaat.org/index.php/pak/article/view/129/129/). Retrieved on July 20, 2016
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Abdul Sattar Edhi 10
Pakistani philanthropist, social activist, ascetic and huma… 1928–2016Related quotes

Quoted from the Progressive February 2002

An introduction to this book
The Religion of God (2000)

Pt. V, ch. II, sec. V.
1920s, Process and Reality: An Essay in Cosmology (1929)

“The basis of religion is our affection for the household of the holy Prophet.”
Majlisi, Bihārul Anwār, vol.78, p. 183
Religous Wisdom

The Tragic Sense of Life (1913), VI : In the Depths of the Abyss

“My country is the world, and my religion is to do good.”

“The world is my country, to promote science is my religion.”
The earliest found citation is in K.O. Meinsma, Spinoza en zijn kring. Historisch-kritische studiën over Hollandsche vrijgeesten (Martinus Nijhoff, 's-Gravenhage, 1896). This influential study was translated in French and German, but not in English. In the original Dutch context it seems as though this is not a quote from Huygens, but a characterisation by the author (Meinsma) of what 'could haven been' Huygens' devise.
In Cosmos: A Personal Voyage (Episode 6) from 1980 it is phrased The world is my country, science my religion.
Also in The Making of Modern Europe, 1648-1780 (1985) by Geoffrey Treasure, p. 474, it is declared that this was Huygens' "motto" — but this seems very similar to the much more famous and long attested declaration of Thomas Paine in Rights of Man (1791): "My country is the world, and my religion is to do good" which has long been paraphrased "The world is my country, and to do good is my religion."
Disputed

“There is not enough religion in the world to destroy the world’s religions.”
Variant: There is not enough love and goodness in the world to permit giving any of it away to imaginary beings.
Source: Human, All Too Human