Definitions: (1) application of steady effort to a purpose; constant exertion to accomplish what is undertaken; assiduous; industrious; (2) done with careful and dedicated resolve; painstaking attention to the task at hand

Synonyms: active, indefatigable, laborious, persevering, sedulous, unremitting, untiring

Strive on with diligence. — Buddha’s last words (c. 563-483 bc)
Note: “Diligence” in this quote is variously translated as earnestness, vigilance, awareness, heedfulness …

Symbol: wings