 It can be hard. I mean, you know, the class work is hard and I mean, some people might find it really easy, but the fact is, is even people that become scientists usually have a period of struggling through courses like physics, so it's okay. It's okay if it's really hard. If it's something that you enjoy, then it's worth getting through and it's worth all the time that you put in because it takes a lot of work and it's a lot of hours of working hard and it pays off as long as you love it. If it's not something that you're loving and you're struggling at, then maybe it's not worth pursuing, but if it's something that you're really interested in yet you still find it difficult, that's okay. Work through it, put in the hours and put in the hard work and it pays off.