If you look at it historically, it’s not proselytizing. It’s saying the Dharma has to spread. Nature has to move the seeds, either through the wind or through a bird, picking it up and dropping it somewhere else. The Dharma spreads. So part of getting the robe or the rakasu is to say I'm part of the spreading. So I bring it somewhere else.
- Nanda Nina Lynch
https://www.shiningbrightlotus.org/sblms-blog/nanda