What man is he that desireth life? Like most moralists, David begins with asking men—Do they wish for happiness? If so, and he assumes that it is so (comp. Arist; 'Eth. Nic.,' I. 1.-7.), then he will point them out the way to it.
And loveth many days, that he may see good? Mere life, mere length of days, would not suffice for men, would be no object of desire, unless it were assumed that the days would bring them "good"—in other words, that they would be happy days.