... with the utmost sincerity, trustworthiness,

likewise, they must treat with and behave toward all the governments, nations, communities, kings and subjects with the utmost sincerity, trustworthiness, straightforwardness, love and kindness. Even they must make hopeful a bloodthirsty enemy, show sympathy with the utmost faithfulness and honor to the perfidious unjust, know the ill-wisher as the well-wisher and torment not the sinner with reproaches. Should they become the targets of a thousand arrows of persecution, they must challenge it with love and friendship and treat every one with purity of purpose and kindness.
O ye friends of God! Show ye an endeavor that all the nations and communities of the world, even the enemies, put their trust, assurance and hope in you; that if a person falls into errors for a hundred-thousand times he may yet turn his face to you, hopeful that you will forgive his sins; for he must not become hopeless, neither grieved nor despondent. This is the conduct and the manner of the people of Baha’. This is the foundation of the most high pathway!

Tablets of Abdul-Baha P.437