An inch of progress is worth more than a yard of complaint.

Never let your work drive you. Master it and keep it in complete control.

One man cannot hold another man down in the ditch without remaining down in the ditch with him.

Lay hold of something that will help you, and then use it to help somebody else.

Nothing ever comes to one, that is worth having, except as a result of hard work.

Let our opportunities overshadow our grievances.

Don't ever let them pull you down so low as to hate them. (also cited as: I will permit no man to narrow and degrade my soul by making me hate him.)