Perhaps that’s what we all had to do — think out for ourselves what we could believe and how we could live by it. And so I came to the conclusion that you had to use this life to develop the very best that you could develop.

Eleanor Roosevelt (1884–1962) First Lady of the US (1933–1945), politician, diplomat, activist

Essay (1951-12), “This I Believe: Growth that Starts from Thinking,” on Edward R. Murrow, This I Believe, CBS Radio
    (Source)

(Source (Audio); start 1:54). The essay was read without a script. The official transcript gives "what we all must do," but the audio clearly says, "what we all had to do."

Collected in Edward P. Morgan (ed.), This I Believe (1952).