<p>And here is what I learned a long time ago which adds to what I was trying to say in my previous post in regards to commas before 'because':</p>
<p><a href="http://grammar.ccc.commnet.edu/grammar/commas.htm%5B/url%5D">http://grammar.ccc.commnet.edu/grammar/commas.htm</a>
[quote]
As pointed out above (Rule #3), an adverbial clause that begins a sentence is set off with a comma:</p>
<pre><code>* Although Queasybreath had spent several years in Antarctica, he still bundled up warmly in the brisk autumns of Ohio.
* Because Tashonda had learned to study by herself, she was able to pass the entrance exam.
</code></pre>
<p>When an adverbial clause comes later on in the sentence, however, the writer must determine if the clause is essential to the meaning of the sentence or not. A "because clause" can be particularly troublesome in this regard. In most sentences, a "because clause" is essential to the meaning of the sentence, and it will not be set off with a comma:</p>
<pre><code>* The Okies had to leave their farms in the midwest because the drought conditions had ruined their farms.
</code></pre>
<p>Sometimes, though, the "because clause" must be set off with a comma to avoid misreading:</p>
<pre><code>* I knew that President Nixon would resign that morning, because my sister-in-law worked in the White House and she called me with the news.
</code></pre>
<p>Without that comma, the sentence says that Nixon's resignation was the fault of my sister-in-law. Nixon did not resign because my sister-in-law worked in the White House, so we set off that clause to make the meaning clearly parenthetical.
[/quote]
</p>
<p>To the OP: Your original sentence does not need commas. 13351 was right. Your sentence should look like this: "Jerry decides to hug Tom because his conscience views Tom as a friend rather than as an enemy."</p>