What we can know, and what we can understand, is so influenced by our location in time that it is impossible for us to disentangle that influence and get a clear look at it. It governs not only our knowledge of our present history and our present future but even our present knowledge of our present society. We cannot see it in perspective.
[Ultimate questions, Bryan Magee]
I don't know the use of "present" before "future". Does it mean "happening"?
Anyway, what does "in perspective mean" in the last sentence?