Verse 8. And according to his state he perceives through his falsified doctrine, that this truth is the ultimate or literal sense of the Word, received and obeyed from an external bond; or that it is Divine Truth intended to lead man, to attract him, to dwell with him, and thus to deter him, in his external state, from his evil courses.

In natural language the word "manifest" simply means to make something clear or obvious. It's interesting, though, that in the Bible the word "manifest" appears only in the New Testament, and -- in the Gospels particularly -- is generally connected with the Lord Himself. To "manifest" something or make something manifest means to reveal the deepest true ideas about the Lord in the Bible, and is something that happens particularly in the process of bringing one church to an end and beginning another. This is, of course, what the Lord was doing during his life in this world; by revealing new and deeper truths, He was bringing an end to the Israelites as the "true" church and launching its successor, the Christian Church.