I am reading the book 'The Man Who Mistook His Wife For a Hat' by Oliver Sacks. On page 104 there is this sentence:
Feeling that Ray also had such possibilities in him, that, despite his own words, he was not incorrigibly centred on his own disease, in an exhibitionistic or narcissistic way, I suggested that we meet weekly for a period of three months.
Neither before or after this sentence is the present tense used, that is, he is narrating a story in the past. Is this a mistake, or actually we can use the present tense in the past to describe a routine (even if that routine no longer exists in the present)?