The symbol of the pelican, used in the sister seal, is also a very old mystical symbol used by Rosicrucians, according to past Imperator Ralph M. Lewis in his book, Behold the Sign!  It represents self sacrifice, and that as we give, so shall we receive.

A sample paragraph depicting the Sisterhood's dedication and discipline reads:

“Now follows our daily school practice and labors before God that we can bring our bodies under earnest subjection so that the spirit may not be pained or hindered in its daily routine; therefore we regulate all our work so as to mortify the body under the Spirit and bring it under bit and bundle so that we can control it and guide it to the proper uses of the spirit.”