Happy the man, of mortals happiest he,
Whose quiet mind from vain desires is free;
Whom neither hopes deceive, nor fears torment,
But lives at peace, within himself content;
In thought, or act, accountable to none
But to himself, and to the gods alone.

George Granville
George Granville (1666-1735) English politician, poet, playwright [1st Baron Lansdowne]
“Epistle to Mrs. Higgons,” l. 79ff (1690)
    (Source)