Well I assume that teaching is more difficult than translating. I mean when translating there's only language and you, but when teaching there are students who expect you to give them knowledge, some of them are more motivated some are less and some are not motivated at all, and your task is to be a ponductor like at a concert and to conduct this orchestra, to spend nights preparing for the lessons. But if you teach well you will be rewarded and it's always a pleasure to see people making progress thanks to YOU... although it's  really hard work...