The only Truth that can be delivered to a four year
Revolutionary with a whole card i.e. skin is this:

from Gil Scott Heron – Comment #1 Lyrics on Rap Genius

Meaning

GSH once again bitterly mocks the SDS and other white “revolutionary” groups, calling them “four year revolutionar[ies]” to question their long-term devotion to the causes they espouse. “Four-year” implies that their commitment will not outlast their college education, a youthful fling that will quickly be given up so that they can enter the white power structure and perpetuate (directly or indirectly) the subordination of blacks.

To help improve the meaning of these lyrics, visit "Comment #1" by Gil Scott Heron Lyrics and leave a comment on the lyrics box