‘The reality of everyday life is taken for granted as reality. It does not require additional verification over and beyond its simple presence. It is simply there, as self-evident and compelling facticity. I know that it is real. While I am capable of engaging in doubt about its reality, I am obliged to suspend such doubt as I routinely exist in everyday life. This suspension of doubt is so firm that to abandon it, as I might want to do, say, in theoretical or religious contemplation, I have to make an extreme transition. The world of everyday life proclaims itself and, when I want to challenge the proclamation, I must engage in a deliberate, by no means easy effort.’

From Peter L. Berger and Thomas Luckmann’s The Social Construction of Reality: A Treatise in the Sociology of Knowledge, original copyright 1966, Anchor Book Edition 1967, 23-24