One of the hardest tasks is to extract continually from one's soul an almost inexhaustible ill will.
— Victor Hugo

I have very large ideas of the mineral wealth of our Nation. I believe it practically inexhaustible. It abounds all over the western country, from the Rocky Mountains to the Pacific, and its development has scarcely commenced. Immigration, which even the war has not stopped, will land upon our shores hundred of thousands more per year from overcrowded Europe. I intend to point them to the gold and silver that waits for them in the West. Tell the miners from me, that I shall promote their interests to the utmost of my ability; because their prosperity is the prosperity of the Nation, and we shall prove in a very few years that we are indeed the treasury of the world.
Abraham Lincoln inexhaustible quote

An inexhaustible good nature is one of the most precious gifts of heaven, spreading itself like oil over the troubled sea of thought, and keeping the mind smooth and equable in the roughest weather.
— Washington Irving

I wanted to get out and walk southward toward the park through the soft twilight, but each time I tried to go I became entangled in some wild, strident argument which pulled me back, as if with ropes, into my chair. Yet high over the city our line of yellow windows must have contributed their share of human secrecy to the casual watcher in the darkening streets, and I was him too, looking up and wondering. I was within and without, simultaneously enchanted and repelled by the inexhaustible variety of life.
— F. Scott Fitzgerald

There are many who talk on from ignorance rather than from knowledge, and who find the former an inexhaustible fund of conversation.
— inexhaustible quotation by William Hazlitt