Hello Abil, In the first sentence the I had always taken the view leads the reader into a discussion of why he had come to take this view, over the period leading up to the time established in the opening sentence. The past perfect tense gives an immediacy to the discussion, by plunging us into his thought processes at the time. At the end the simple past presents his taking the view in the context of a review of his thought processes over the period.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.