\documentclass{amsart}

  \input AmsTeX4ht.sty
  \Preamble{html}

\Configure{title}{\HCode{<H2>}}{\HCode{</H2>}}
\Configure{authors}{\HCode{<I>}}{\HCode{</I>}}
\Configure{abstract}{\HCode{<HR>}}{\HCode{<HR>}}

\begin{document}    \EndPreamble
  \title{Psalms} \author{131:1}
  \begin{abstract}My heart is
       not haughty\end{abstract}
  \maketitle

  nor mine eyes lofty: neither
  do I exercise myself in great
  matters, or in things too high
  for me.
\end{document}