Christians took an offering that was not obligatory

The tried men of our elders preside over us, obtaining that honor not by purchase, but by established character. There is no buying and selling of any sort in the things of God. Though we have our treasure-chest, it is not made up of purchase-money, as of a religion that has its price. On the monthly day, if he likes, each puts in a small donation; but only if it be his pleasure, and only if he be able: for there is no compulsion; all is voluntary. These gifts are, as it were, piety’s deposit fund.  For they are not taken thence and spent on feasts, and drinking-bouts, and eating-houses, but to support and bury poor people, to supply the wants of boys and girls destitute of means and parents, and of old persons confined now to the house; such, too, as have suffered shipwreck; and if there happen to be any in the mines, or banished to the islands, or shut up in the prisons, for nothing but their fidelity to the cause of God’s Church, they become the nurslings of their confession. But it is mainly the deeds of a love so noble that lead many to put a brand upon us.

Tertullian
Apology
Chapter XXXIX

Christians believe killing the fetus is murder

In our case, murder being once for all forbidden, we may not destroy even the fetus in the womb, while as yet the human being derives blood from other parts of the body for its sustenance. To hinder a birth is merely a speedier man-killing; nor does it matter whether you take away a life that is born, or destroy one that is coming to the birth. That is a man which is going to be one; you have the fruit already in its seed.

Tertullian
Apology
Chapter IX

Riches are good in the service of God

So let no man destroy wealth, rather than the passions of the soul, which are incompatible with the better use of wealth. So that, becoming virtuous and good, he may be able to make a good use of these riches. The renunciation, then, and selling of all possessions, is to be understood as spoken of the passions of the soul.

…For he who holds possessions, and gold, and silver, and houses, as the gifts of God; and ministers from them to the God who gives them for the salvation of men; and knows that he possesses them more for the sake of the brethren than his own; and is superior to the possession of them, not the slave of the things he possesses; and does not carry them about in his soul, nor bind and circumscribe his life within them, but is ever laboring at some good and divine work, even should he be necessarily some time or other deprived of them, is able with cheerful mind to bear their removal equally with their abundance. This is he who is blessed by the Lord, and called poor in spirit, a meet heir of the kingdom of heaven, not one who could not live rich.

Clement of Alexandria
The Stromata, Book VIII
Chapter XII

The cause of skepticism

The causes productive of skepticism are two things principally. One is the changefulness and instability of the human mind, whose nature it is to generate dissent, either that of one with another, or that of people with themselves. And the second is the discrepancy which is in things; which, as to be expected, is calculated to be productive of skepticism.

Clement of Alexandria
The Stromata, Book VIII
Chaper VII

The Christian life is deeds and words in the tradition of the Lord

Our Gnostic then alone, having grown old in the Scriptures, and maintaining apostolic and ecclesiastic orthodoxy in doctrines, lives most correctly in accordance with the Gospel, and discovers the proofs, for which he may have made search (sent forth as he is by the Lord), from the law and the prophets. For the life of the Gnostic, in my view, is nothing but deeds and words corresponding to the tradition of the Lord.

Clement of Alexandria
The Stromata, Book VI
Chapter XVI

The hours of prayer

Now, if some assign definite hours for prayer— as, for example, the third, and sixth, and ninth— yet the Gnostic prays throughout his whole life, endeavoring by prayer to have fellowship with God. And, briefly, having reached to this, he leaves behind him all that is of no service, as having now received the perfection of the man that acts by love. But the distribution of the hours into a threefold division, honored with as many prayers, those are acquainted with, who know the blessed triad of the holy abodes.

Clement of Alexandria
The Stromata, Book VII
Chapter VII

Early admonitions against racism

And it prohibits an ox and ass to be yoked in the plough together; pointing perhaps to the want of agreement in the case of the animals; and at the same time teaching not to wrong any one belonging to another race, and bring him under the yoke, when there is no other cause to allege than difference of race, which is no cause at all, being neither wickedness nor the effect of wickedness.

Clement of Alexandria
The Stromata, Book II
Chapter XVIII