How to use "therefore" in a sentence

I therefore consider that, in view of the Constitution and the laws, the Union is unbroken; and to the extent of my ability I shall take care, as the Constitution itself expressly enjoins upon me, that the laws of the Union be faithfully executed in all the States

I, therefore, venture to suggest to my learned countrymen that so long as the doctrine of non-cooperation remains non-violent, so long there is nothing unconstitutional in that doctrine.

He persuaded Cosette, therefore, not to use any of the money her guardian had given her, and to live on the money that he had started to earn as a lawyer

Marius, meanwhile, was grateful for finally having the chance to help Thenardier, and therefore to keep the promise he had made to his father

In those days, the corpse was not embalmed; therefore, the boy was buried while still alive

He could see a time when there would be no aeroplanes, ships, trains or cars and, therefore, no roads or railway lines, ports, airports or stations

A Martian, therefore, would weigh three times more than on Mars, although his strength would be the same

My narrative must therefore begin with Marian's terrible illness.