Events vs. method calls

I was planning on implementing some Events in my plugin, because i want to write an extension where I will utilize those Events. Now I'm busy writing an in game explanatory tutorial and I was wondering if I should call the methods to send messages directly or listen for the Events which I will be sending anyways and just display my message there.

I like the Event Idea because then my classes are more or less independent from one another, if i remove the Tutorial class to send messages my main class will still work.

So the basic question is: Is it a good idea to use Events when I can also use straight method calls?