William Herndon

Herndon kept a shelf of transcendentalists and abolitionist tracts in the back of the law office and treated it less like a library than a conversation partner — he devoured Theodore Parker's sermons and Emerson's essays the way other lawyers devoured case law, and he brought the results into every discussion he had with his more circumspect partner. Where Lincoln weighed a position until it was politically load-bearing, Herndon simply believed things, loudly and early, and pushed — on slavery, on the moral stakes of the Union, on the abolitionist case Lincoln wouldn't yet make in public.

That same appetite for possibility made him the office's idea generator and its least reliable clerk. He would chase a legal theory, a philosophical argument, or a political scheme with total conviction for a week and then abandon it for the next one, leaving Lincoln to do the slow, patient work of turning enthusiasm into something a judge or a voter could use. It is the classic dominant-Ne bargain: brilliant at multiplying angles on a problem, much less interested in picking one and finishing it.

Politically, this made him useful in a way Lincoln quietly relied on — Herndon's radicalism let him test arguments in public that Lincoln could not yet risk, and his correspondence with antislavery editors and activists around the country kept the Springfield office wired into currents Lincoln, cautious by temperament, might otherwise have missed entirely.

Underneath the enthusiasm sat a conviction Herndon never treated as negotiable: that he understood the real Lincoln — not the icon, not the campaign biography's frontier saint, but the moody, ambitious, sometimes cold man he had shared an office and a friendship with for sixteen years — and that getting him right mattered more than getting him flattering. That is auxiliary Fi in its purest form, a private inner standard held with more loyalty than the man ever showed his own bank account.

It shaped how he practiced law, too. Herndon's radical abolitionism was never a pose calculated for advantage; he held it because he believed it, sometimes to the discomfort of a partner who needed Illinois voters more than Herndon needed anyone's approval. He argued with Lincoln, disagreed with him in print, and stayed devoted to him anyway, because the two things — conviction and loyalty — were never in tension for Herndon the way they might be for someone more conflict-averse.

Even friends who found him exhausting conceded the underlying loyalty was real. Herndon kept the partnership's sign hanging outside their Springfield office — Lincoln & Herndon — untouched through every one of Lincoln's absences on the legal circuit and in Washington, a small, stubborn insistence that the bond mattered more than the credit.

The same restlessness that made Herndon a live wire in argument made him a disaster at the unglamorous maintenance of an ordinary life. He drank, sometimes badly enough to embarrass the firm; he speculated and borrowed and ran through money faster than the partnership's modest fees replenished it. Routine, budgeting, moderation — the whole Si toolkit of steady habit and accumulated caution — never took hold in him the way conviction and curiosity did.

Lincoln, by most accounts, tolerated it with more patience than Herndon's creditors managed, understanding that the same man who forgot to reconcile the office accounts was also the one keeping the practice's energy and its political nerve alive. It was a trade Lincoln seemed to think worth making.

The pattern is textbook inferior Si: not an absence of discipline exactly, but a chronic inability to trust it as a source of stability, so that Herndon kept reaching instead for the next inspired scheme to solve problems patience would have solved more cheaply. It cost him comfort and reputation among neighbors who valued steadiness — but it never touched the one thing he refused to let slip, which was the partnership itself.

Why ENFP Over INFP

The extraversion is the tell. An INFP's Fi usually leads, with Ne trailing behind to explore consequences of a conviction already settled in private; Herndon's convictions arrived in the middle of an argument, sharpened by the friction of disagreement rather than solitary reflection. He needed an audience — Lincoln most of all — the way a dominant Ne needs new material, and he found in the law partnership exactly the arena an ENFP thrives in: high-stakes talk, constant reinvention, and one steady, skeptical partner to push against.