War should never be entered upon until every agency of peace has failed. William McKinley
Those who have never entered upon scientific pursuits know not a tithe of the poetry by which they are surrounded. Herbert Spencer
With the introduction of agriculture mankind entered upon a long period of meanness, misery, and madness, from which they are only now being freed by the beneficent operation of the machine. Bertrand Russell
We have entered upon a period of struggle. Our national fault is that too much softness has crept into our councils, and we imagine that great national dangers can be conjured by a plentiful administration of platitudes and rose-water. Robert Gascoyne-Cecil, 3rd Marquess of Salisbury
Life is to entered upon with courage. Alexis de Tocqueville
Justice is a contract of expediency, entered upon to prevent men harming or being harmed. Epicurus