I see we're posting Calvin and Hobbes today so I just want to chime in with one of my all-time favorites. Hobbes nails it in the second to last panel.

This also applies to work: If you have to do it, it's a job. If you choose to do it, it's vacation.

This strip in particular was what earned Calvin & Hobbes a special place in my heart. I loved learning outside of school because I could learn about the different parts of a subject whenever I wanted. At school, you were told what order you had to learn them in. (cont)

Actually if it bites you and you die, it's venomous. If you bite it and you die, it's poisonous.