Work unto death! I am with you, and when I am gone, my spirit will work with you. This life comes and goes; wealth, fame, enjoyments are only of a few days. It is better, far better to die on the field of duty, preaching the truth, than to die like a worldly worm. Advance!
When we decide to be happy we accept the responsibility to bring happiness to someone else. Some decide that happiness and glee are the same thing, they are not. When we choose happiness we accept the responsibility to lighten the load of someone else and to be a light on the path to another who may be walking in darkness.
No matter how insignificant the thing you have to do, do it as well as you can, give it as much of your care and attention as you would give to the thing you regard as most important. For it will be by those small things that you shall be judged.
Those people who develop the ability to continuously acquire new and better forms of knowledge that they can apply to their work and to their lives will be the movers and shakers in our society for the indefinite future.