Both Uses of

felicity

in

Common Sense

This is not inflaming or exaggerating matters, but trying them by those feelings and affections which nature justifies, and without which, we should be incapable of discharging the social duties of life, or enjoying the felicities of it.†
Chpt 3.

…am not induced by motives of pride, party, or resentment to espouse the doctrine of separation and independance; I am clearly, positively, and conscientiously persuaded that it is the true interest of this continent to be so; that every thing short of THAT is mere patchwork, that it can afford no lasting felicity, —that it is leaving the sword to our children, and shrinking back at a time, when, a little more, a little farther, would have rendered this continent the glory of the earth.†
Chpt 3. *

Definition:

(felicity as in: domestic felicity)
happiness or luck; or an instance or source of such