From the poem (second of three stanzas):
Compassionate, available to pity;Generous if they’re rich, but generous too,Doing whatever they can, if they are poor;Always true to the truth, no matter what,But never scornful of those who have to lie.
From some other translations:
George Barbanis: "always speaking the truth, yet without hatred for those who lie."
Edmund Keeley/Philip Sherrard: "always speaking the truth, yet without hating those who lie."
John Cavafy: "speaking the truth despite all hindrances, without ill-will, however, for the liars."
poemhunter.com: "always speaking the truth, but without rancor for those who lie."