Nevertheless, the feeling I insist upon having is hope—the chance of righting this sinking ship before it is too late.
He also reports that as she approaches her 69thbirthday, she continues to insist upon her innocence.
1580s, from Latin insistere "persist, dwell upon, stand upon," from in- "upon" (see in- (2)) + sistere "take a stand" (see assist). Perhaps in some cases a back-formation from insistence. Related: Insisted; insisting.