One of Don Knuth's recommendations for fixing various typographical issues is to rewrite the passage in question – assuming that doing so is possible and/or permissible, of course. (The passage you cite is one case where you mustn't change a single word, obviously.) If you can't/mustn't rewrite the passage, you can still try to change some parameters such as the line width, font size, interword spacing, and occasionally impose a tie (unbreakable space), all in order to try to mitigate the problem.
Addendum: I've succeeded in reproducing the OP's text fragment in the following MWE:
\documentclass{article}
\usepackage[french]{babel}
\usepackage{kpfonts}
\begin{document}
\begin{minipage}{1.7in}
Je suis venu non pour juger le monde, mais pour sauver le monde. Celui qui me rejette
et qui ne re\c coit pas mes
\end{minipage}
\bigskip
\begin{minipage}{1.7in}
Je suis venu non pour juger~le monde, mais pour sauver le monde. Celui qui me rejette
et qui ne re\c coit pas mes
\end{minipage}
\bigskip
\begin{minipage}{1.6in}
Je suis venu non pour juger le monde, mais pour sauver le monde. Celui qui me rejette
et qui ne re\c coit pas mes
\end{minipage}
\bigskip
\begin{minipage}{1.8in}
Je suis venu non pour juger le monde, mais pour sauver le monde. Celui qui me rejette
et qui ne re\c coit pas mes
\end{minipage}
\end{document}
The first minipage reproduces the initial problem. In example two, I've inserted a tie between "juger" and "le": this forces a hyphenation of the word "juger" and succeeds in breaking up the repetition, at the cost of loose word spacing (given the narrow measure!). The second example does not impose a tie but shortens the measure, also breaking up the vertical word repetition a bit but also suffering from loose word spacing (esp in line 3). The fourth example widens the measure a bit; now lines 2 and 3 both start with "monde" (as opposed to "le monde" in the first example), and the interword spacing looks OK overall. A slight improvement, maybe, but really only very slight. I guess the problem to solve is particularly vexing because the repeated-word group contains two, rather than just one, word!
Do the following self explanatory combinations work for you? (Leaving aside aesthetic issues.)
\documentclass{article}
\usepackage{ulem}
\begin{document}
I think computer \uline{viruses should count as life. I think it says
something about human nature} that the only form of life we have
created so far is purely destructive. We've created life in our own
image.
I think computer \uline{viruses should \textit{count as life. I think
it} says something about human nature} that the only form of life
we have created so far is purely destructive. We've created life in
our own image.
I think computer \uline{\textit{viruses should count as life. I think
it} says something about human nature} that the only form of life
we have created so far is purely destructive. We've created life in
our own image.
I think computer \uline{\textit{viruses should count \textbf{as
life. I think} it} says something \textbf{about human} nature}
that the only form of life we have created so far is purely
destructive. We've created life in our own image.
\textit{\textbf{\uline{I think computer viruses should count as
life. I think it says something about human nature that the only
form of life we have created so far is purely destructive. We've
created life in our own image.}}}
\end{document}
\documentclass{article}
\usepackage{ulem}
Tips
Always make \uline
the last one to be applied when you need multiple effects on a complete paragraph. It behaves badly (no line wraps) when other font commands are applied after it.
Best Answer
You can use
\uline
fromulem
package:The option
normalem
is passed to preventulem
from under lining theemph
asised text.Another option is to use
\ul
fromsoul
package: