Someone with a 3-5 profile in Human Design is driven to take the results of their experiences and use those to project change and what they see as the Truth to the rest of the world. In Human Design the 3rd line is called the Martyr and the 5th line is called the Heretic. What follows explains why this profile carries such heavy names.
The 3rd line profile is driven to experiment with certain things or put themselves in situations so they can have an experience from which they extract truths. This process has an inward or self focus. As they go through it they are constantly internalizing what is revealed and how this impacts them. After synthesizing the impact, they then share the results with world or at least their local community. Because society judges some experiments as failures the 3rd line carries the moniker of Martyr.
The 5th line kicks in to share the results of these experiments/experiences in a projected way. In a broadcast like a movie projector, they not only say “Here is what I learned”, but also add, “This is how you should change your behavior or yourself to benefit from the Truth I have discovered.” The 5th line is driven to create this change, often geared toward changing the behavior of others. This projection also carries an absoluteness to it, as in “I know this is right.” However since this energy is projected, it needs to be invited. People don’t want change unless they are ready for it. If the prognostications of the 5th line are not invited then the 5th line person can feel the oppression of rejection or the insult of being ignored. This is why the 5th line carries the moniker of the Heretic.
The 3-5 profile can be one of the more difficult profiles to feel at harmony with the rest of humanity. Between the projection not always being invited and the experiments being judged, the 3-5 person can feel pressure from the world to withdraw to get out of the heat. Yet the 5th line is determined to make change and will push the 3-5 out there again, to project the way.