I shall have more to say when I am dead.

Taken at face value, the line suggests a speaker who believes their fullest meaning or “testimony” will only be understood after death—when life’s ambiguities are resolved into a final narrative. In a Robinsonian key, it can also imply the limits of self-explanation during life: reputation, motives, and inner truth are often misread or inexpressible while one is still entangled in circumstance. The remark carries a dry, fatalistic wit, hinting that posterity (or the silence of the grave) may be the only arena where the speaker’s real story can be told—or where others will finally listen.