The Church received from the apostles the tradition of giving baptism even to infants. The apostles, to whom were committed the secrets of the divine sacraments, knew there are in everyone innate strains of [original] sin, which must be washed away through water and the Spirit
OrigenIt can be shown that an incorporeal and reasonable being has life in itself independently of the body... then it is beyond a doubt bodies are only of secondary importance and arise from time to time to meet the varying conditions of reasonable creatures. Those who require bodies are clothed with them, and contrariwise, when fallen souls have lifted themselves up to better things their bodies are once more annihilated. They are ever vanishing and ever reappearing.
OrigenHe who is anxious to attain a true understanding of holy Scripture, will discover the spiritual truths which are spoken by it to those who are called "spiritual," by comparing the meaning of what is addressed to those of weaker mind with what is announced to such as are of acuter understanding, both meanings being frequently found in the same passage by him who is capable of comprehending it.
OrigenThe honor that we pay to the Son of God, as well as that which we render to God the Father, consists of an upright course of life. This is plainly taught us by the passage, "You that boast of the Law, through breaking the Law dishonor God."...For if he who transgresses the law dishonors God by his transgression,...it is evident that he who keeps the law honors God. So the worshipper of God is he whose life is regulated by the principles and teachings of the Divine Word
Origen