We cannot travel every path. Success must be won along one line. We must make our business the one life purpose to which every other must be ___________. I hate a thing done by halves. If it be right, do it boldly. If it be wrong, leave it undone. The men of history were not perpetually looking into the mirror to make sure of their own size. _________ in their work they did it.

题目：We cannot travel every path. Success must be won along one line. We must make our business the one life purpose to which every other must be ___________. I hate a thing done by halves. If it be right, do it boldly. If it be wrong, leave it undone. The men of history were not perpetually looking into the mirror to make sure of their own size. _________ in their work they did it.