I happen to be reading Ronald Reagan’s presidential diaries right now. Just last night, I came across a concise gem of insight into what and who Joe Biden always has been.

Reagan’s diaries were hand-written, often in a sort of shorthand and with rushed, sketchy spelling, but they are insightful and illuminating about the life, schedule, and portfolio of a president. Even in private diaries, Reagan’s sunny personality and quick wit shine brightly. Even his criticisms of his political opponents usually lack harsh edges.