Christ spoke to Moses in the burning bush

For at that juncture, when Moses was ordered to go down into Egypt and lead out the people of the Israelites who were there, and while he was tending the flocks of his maternal uncle in the land of Arabia, our Christ conversed with him under the appearance of fire from a bush, and said, “Put off thy shoes, and draw near and hear.” And he, when he had put off his shoes and drawn near, heard that he was to go down into Egypt and lead out the people of the Israelites there; and he received mighty power from Christ, who spoke to him in the appearance of fire, and went down and led out the people, having done great and marvelous things; which, if you desire to know, you will learn them accurately from his writings.

Justin Martyr
First Apology
Chapter LXII

Dissolved bodies rise again

But as at first you would not have believed it possible that such persons could be produced from the small drop, and yet now you see them thus produced, so also judge ye that it is not impossible that the bodies of men, after they have been dissolved, and like seeds resolved into earth, should in God’s appointed time rise again and put on incorruption.

Justin Martyr
First Apology
Chapter XIX

Baptism regenerates

As many as are persuaded and believe that what we teach and say is true, and undertake to be able to live accordingly, are instructed to pray and to entreat God with fasting, for the remission of their sins that are past, we praying and fasting with them. Then they are brought by us where there is water, and are regenerated in the same manner in which we were ourselves regenerated. For, in the name of God, the Father and Lord of the universe, and of our Savior Jesus Christ, and of the Holy Spirit, they then receive the washing with water.

Justin Martyr
First Apology
Chapter LXI

The cross had a crossbeam

And this, as the prophet foretold, is the greatest symbol of His power and role; as is also proved by the things which fall under our observation. For consider all the things in the world, whether without this form they could be administered or have any community. For the sea is not traversed except that trophy which is called a sail abide safe in the ship; and the earth is not plowed without it: diggers and mechanics do not their work, except with tools which have this shape. And the human form differs from that of the irrational animals in nothing else than in its being erect and having the hands extended, and having on the face extending from the forehead what is called the nose, through which there is respiration for the living creature; and this shows no other form than that of the cross.

Justin Martyr
First Apology
Chapter LV

Only two advents. Resurrection and Hell.

For the prophets have proclaimed two advents of His: the one, that which is already past, when He came as a dishonored and suffering Man; but the second, when, according to prophecy, He shall come from heaven with glory, accompanied by His angelic host, when also He shall raise the bodies of all men who have lived, and shall clothe those of the worthy with immortality, and shall send those of the wicked, endued with eternal sensibility, into everlasting fire with the wicked devils.

Justin Martyr
First Apology
Chapter LII

Jesus spoke through the prophets

But when you hear the utterances of the prophets spoken as it were personally, you must not suppose that they are spoken by the inspired themselves, but by the Divine Word who moves them. For sometimes He declares things that are to come to pass, in the manner of one who foretells the future; sometimes He speaks as from the person of God the Lord and Father of all; sometimes as from the person of Christ; sometimes as from the person of the people answering the Lord or His Father, just as you can see even in your own writers, one man being the writer of the whole, but introducing the persons who converse.

Justin Martyr
First Apology
Chapter XXXVI