Is there a limit on knowledge?

Before asking this question in class, I was rather confused on how this could be answered. One student proposed the idea since time is limited for an individual, then knowledge is as well because we can only learn so much in our life time. With endless subjects of knowledge, it does not seem possible for a limit. Also, as one begins to learn more, he/she also tends to realize how much there is to the subject than anticipated, along with seeing through different perspectives. 

I personally don't believe there's a limit on the capacity of knowledge for the human race, however an individual is limited by time and themselves.