Offerings to propitiate the dead then were regarded as belonging to the class of funeral sacrifices, and these are idolatry. Idolatry, in fact, is a sort of homage to the departed, the one as well as the other is a service to dead men. Moreover, demons dwell in the images of the dead. ... this sort of exhibition has passed from honors of the dead to honors of the living; I mean, to quaestorships [financial overseers]and magistractes, to priestly offices of different kinds. Yet, since idolatry still cleaves to the dignity's name, whatever is done in its name partakes of its impurity.
TertullianIt is our care for the helpless, our practice of loving kindness, that brands us in the eyes of those who oppose us.
TertullianIt is not consistent with truth that a man should sacrifice half of his stomach only to God-that he should be sober in drinking, but intemperate in eating. Your belly is your God, your liver is your temple, your paunch is your altar, the cook is your priest, and the fat steam is your Holy Spirit; the seasonings and the sauces are your chrisms, and your belchings are your prophesizing...[such] a grossly- feeding Christian is akin to lions and wolves rather than God. Our Lord Jesus called Himself Truth and not habit.
TertullianThus the connection of the Father in the Son, and of the Son in the Paraclete, produces three coherent Persons, who are yet distinct One from Another. These three are one [thing], not one [Person], as it is said, 'I and my Father are One,' in respect of unity of substance not singularity of number.
Tertullian