In no station of life are men shut out from the enjoyment of the supreme good.
Book II.

is a deduction of the more special laws of nature and duties of life, so far as they follow from the course of life shown above to be recommended by God and nature as most lovely and most advantageous; all adventitious states or relations among men aside.

The three first chapters are of a general nature.
In Chapter I., he reviews the circumstances that increase the moral good or evil of actions.

Virtue being primarily an affair of the will or affections, there can be no imputation of virtue or vice in action, unless a man is free and able to act; the necessity and impossibility, as grounds of non-imputation, must, however, have been in no way brought about by the agent himself.

In like manner, he considers what effects and consequents of his actions are imputable to the agent; remarking, by the way, that the want of a proper degree of good affections and of solicitude for the public good is morally evil.