The spirit of the man and his work is manifested in his favorite motto, _Nullum jus sine officio, nullum officium sine jure_ (“No right without its duties, no duty without its rights”). It is not necessary to mention his numerous writings except the one of immediate interest here,--“The Stranger in America,” published in 1834, a series of letters written to a friend in Germany. In the selection that follows, the reader will be struck by the wisdom and foresight in pointing out the danger of segregation and the futility of German immigrants attempting to erect a German state within the United States. A GERMAN IMMIGRANT POINTS OUT THE DANGERS OF SEGREGATION The Germans, as I said, form a most valuable addition to our population, when mingled with the great predominant race inhabiting the northern part of this continent. Whenever colonists settle among a different nation, in such numbers and so closely together that they may live on among themselves, without intermixture with the original inhabitants, a variety of inconveniences will necessarily arise. Living in an isolated state, the current of civilization of the country in which they live does not reach them; and they are equally cut off from that of their mother country: mental stagnation is the consequence. They remain a foreign element, an ill-joined part of the great machinery of which they still form, and needs must form, a part. Sometimes, indeed, particular circumstances may alter the view of the case. When the French Protestant colonists were received into Prussia, it was perhaps judicious to allow them, for example in Berlin, to form for a time a community for themselves, to have their own jurisdiction, schools, and churches, because they were more perfect in many branches of industry than the people among whom they settled; and, had they been obliged to immerge forthwith, their skill, so desirable to those who received them, might have been lost.