[stfassisi]

The New Testament might almost be called the angelic part of Sacred Scriptures. From the beginning of the gospel of St. Matthew to the closing of the book of Revelation, the angels are featured as a part of God’s mysterious providence over the New Israel. Our Lord Jesus Christ often speaks of the angels. Referring to the children whom the disciples wanted to drive away. Now says our Lord. “The angels in heaven are continually in the presence of my Father.”

[stfassisi]

Catholic Ping!

[Wings-n-Wind]

Now says our Lord. “The angels in heaven are continually in the presence of my Father.”

The holy messengers are still with us...

The Lord's messengers... warriors... healers...

And then, when he presented his honored Son to the world, God said, “Let all the angels of God worship him.

God calls his angels...
“messengers swift as the wind,
...and servants made of flaming fire.

--Hebrews 1:6-7 (NLT)

[Cvengr]

"Only those who believe in angels are Christians."

Perhaps the intent is better expressed that Christians who advance in faith believe in angels.

Anything added to faith in God through Christ voids that faith as a saving faith. Accordingly, it is possible to be a believer, i.e. a Christian, with faith in God through Christ, yet not yet have been cognizant of angels or further advanced in faith and sanctification to yet recognize them. There may be many testimonies yet to be made in resolving the angelic conflict which still call upon a saint, uncognizant of the angelic domain, to bear an appropriate witness for their observation.