I think the statement is one of general encouragement. But take the words literally. They might even be boilerplate if it was a first email exchange. In the US, individual professors don't normally have the power to admit students. Elsewhere they might, but I'm guessing that if he has the power you aren't his top choice. Apply broadly.
If it is something other than boilerplate then the person seems to be saying that you are a good candidate, generally, for graduate study, but that, for whatever reason, your acceptance here isn't guaranteed. You may be trying to apply at too competitive an institution, or even one that isn't competitive enough.
I would normally just ignore a lot of blind emails from students, especially when it was clear they were in some different field and had no knowledge of what I did. But, perhaps this person is a bit more polite and, thus, boilerplate is the result.