A person can think however they want. Actions, like many have said, define a person in the end. Someone can advocate for peace with malicious intent, but they will still likely be remembered for advocating peace and not for their impure motivations. If these contradicting images are revealed to the public, that is still an act against that person, and is no longer a thought.
However, this is only from the public's view. When it comes to people, they may as well be the embodiment of their thoughts. Everything is fueled by something. The same person who seeds their own goals under the guise of peace will not think of themselves as one who acts with the intentions of bringing peace. They will be looking to call forth whatever it is that they want, and be aware that what they present to the public is not the truth.
So, both points are arguable. It depends on whether you value the individual or the community. Actions are what are remembered, and thoughts are a person's reason. Even today, this comes into relevancy because people want to know why certain figures in history did what they did. Thoughts make a person human, after all. Without thought, seperation of man and beast would be nigh impossible. Without action, man would have been left behind long ago. Both thought and action are important indeed.
It could be because (1) they don't understand the concept of the subject to do assignment (2) they don't understand the criteria (3) the teacher makes it too long or hard (4) they don't want to do it.
The battle between Beowulf and Grendal was aggressive. It was violent and displayed the strength between the masculine figures. It was the force between good and evil. The narrator has Christian views that is clearly demonstrated through this battle. It is stated that Beowulf received his strength that defeated Grendal by God.
He sees different aspects of how cases are handled which also helps him when writing because he can view different points of views. This ties into his responsibility as an author because it’s part of his job to reach out to the public about this kind of everyday problem.