Pioneers are "pure souls," "stars," "chosen people"...

In 1923, a letter by Shoghi Effendi described pioneers as "pure souls," "stars," "chosen people," and "are weeping their lives away in order to give light to the world and establish the purpose of their Lord and Saviour, which purpose is the salvation of mankind."

http://bahai-library.com/shoghieffendi_messages_antipodes&chapter=1#22%20June%201923