I need hardly say how earnestly I believe that men should have a keen and lively sense of their obligations in politics, of their duty to help forward great causes, and to struggle for the betterment of conditions that are unjust to their fellows, the men and women who are less fortunate in life.
 Theodore Roosevelt, Theodore Roosevelt; an Autobiography (1913). copy citation

Context

“I wished to act squarely to others, and I wished to be able to show that I could hold my own as against others. The attitude of my new friends toward me was first one of polite reserve, and then that of friendly alliance. Afterwards I became admitted to comradeship, and then to leadership. I need hardly say how earnestly I believe that men should have a keen and lively sense of their obligations in politics, of their duty to help forward great causes, and to struggle for the betterment of conditions that are unjust to their fellows, the men and women who are less fortunate in life. But in addition to this feeling there must be a feeling of real fellowship with the other men and women engaged in the same task, fellowship of work, with fun to vary the work; for unless there is this feeling of fellowship, of common effort on an equal plane for a common end, it will be difficult to keep the relations wholesome and natural.” source