It is from The Odyssey by Homer. The s<span>peaker was Agamemnon. The whole quote is -
</span>I tell you this – bear it in mind, you must –
when you reach your homeland steer your ship
into port in secret, never out in the open…
<span>the time for trusting women's gone forever!</span>
I requested mahesh to please close the door
The best way to combine these ideas is the third sentence. The first sentence is an "if, then" statement, which does indicate how things actually were when Shakespeare was in school. The second sentence implies that the school day was long during Shakespeare's time <em>because</em> the teachers were strict, which is not effective, because the two facts are not related. The final sentence is not properly formatted, so it is confusing for the reader. The third sentence, however, simply states two facts about schooling during Shakespeare's lifetime that provide concrete information.