Can You See Angels?

I can! There's Albert Pujols!

What about REAL angels? Like the ones that appeared to Abraham, Zacharias, Mary, Joseph, the shepherds at Christ's birth, the women at Christ's tomb, the apostles, and the one that sprang St. Paul from the hoosegow?

Saint Thomas discusses this in Summa Theologiae:

"Yet Divine Scripture from time to time introduces angels so apparent as to be seen commonly by all; just as the angels who appeared to Abraham were seen by him and by his whole family, by Lot, and by the citizens of Sodom; in like manner the angel who appeared to Tobias was seen by all present. From all this it is clearly shown that such apparitions were beheld by bodily vision, whereby the object seen exists outside the person beholding it, and can accordingly be seen by all. Now by such a vision only a body can be beheld. Consequently, since the angels are not bodies, nor have they bodies naturally united with them, as is clear from what has been said (1; 50, 1), it follows that they sometimes assume bodies."
 
"Although air as long as it is in a state of rarefaction has neither shape nor color, yet when condensed it can both be shaped and colored as appears in the clouds. Even so the angels assume bodies of air, condensing it by the Divine power in so far as is needful for forming the assumed body."