Liberty must be limited in order to be enjoyed. [ Burke ]

Knowledge is boundless, - human capacity, limited. [ Chamfort ]

Limited in his nature, infinite in his desires, man is a fallen god who remembers heaven. [ Lamartine ]

Every great poem is in itself limited by necessity, but in its suggestions unlimited and infinite. [ Henry Wadsworth Longfellow ]

Men of limited intelligence generally condemn everything that is above their power of understanding. [ La Roche ]

Much wishes man for himself, and yet needs he but little; for the days are short, and limited is the fate of mortals. [ Johann Wolfgang von Goethe ]

The science of women, as that of men, must be limited according to their powers: the difference of their characters ought to limit that of their studies. [ Fenelon ]

It is difficult for the mind to span the career of nobody; the sphere of action opened to this wonderful person so enlarges every day that the limited faculties of anybody are too weak to compass it. [ Dickens ]

Truth contradicts our nature, error does not, and for a very simple reason: truth requires us to regard ourselves as limited, error flatters us to think of ourselves as in one or other way unlimited. [ Johann Wolfgang von Goethe ]

Man is intended for a limited condition; objects that are simple, near, determinate, he comprehends, and he becomes accustomed to employ such means as are at hand; but on entering a wider field he now knows neither what he would nor what he should. [ Johann Wolfgang von Goethe ]

Portion or Part? The distinction between these words is usually unheeded. A portion is a part assigned, allotted, or set aside for a special purpose; part has a less limited meaning. Hence, we may say correctly:
In what part of the city do you live?
What portion of the estate do you inherit?. [ Pure English, Hackett And Girvin, 1884 ]