[1][2] Postel was also a member from the Third Order of Saint Francis[2] and had served as a schoolteacher after the French Revolution where she oversaw the education of around 300 children.

[1][3] The Benedictine nuns oversaw her education in Valognes after her initial schooling and it was during that time that she discerned a call to serve God in the religious life; she took a private vow to remain chaste as a step forward in this dream.

[3][1] Postel founded a school for girls in Barfleur in 1774 that became a center for underground religious activities during the French Revolution for those who were unwilling to support the new regime.

[1] Authorization was granted to her to keep the Blessed Sacrament in her house as the conflict continued and she carried it on her person at times to provide the Viaticum to those who were ill and at the verge of death.

[3] Postel died in 1846; her order continues its work in places such as Romania and Mozambique and in 2005 had 442 religious in 69 different locations worldwide.