This is be one of the best collections of business advice that I have ever seen.

The safest plan, and the one most sure of success for the young man starting in life, is to select the vocation which is most congenial to his tastes.

…

Work at it, if necessary, early and late, in season and out of season, not leaving a stone unturned, and never deferring for a single hour that which can be done just as well now.