Let Tom and Jane not think, because they see
one man is picking pockets and another
is offering all his goods to charity,
that they can judge their neighbors with God’s eyes:
for the pious man may fall, and the thief may rise.

[Non creda donna Berta e ser Martino,
per vedere un furare, altro offerere,
vederli dentro al consiglio divino;
ché quel può surgere, e quel può cadere.]

Dante Alighieri (1265-1321) Italian poet

The Divine Comedy [Divina Commedia], Book 3 “Paradiso,” Canto 13, l. 139ff (13.139-142) [Thomas Aquinas] (1320) [tr. Ciardi (1970)]
    (Source)

Berta and Martino were common names in Dante's era, and stand in for "ordinary people" (with a sarcastic hint of pretension by giving them minor titles). Most translators use a straight translation of the names to Bertha and Martin; others change them to something more modern to reflect their everyman status.

(Source (Italian)). Alternate translations:

The pious man
May fail ; the Penitent, altho' by spoil
He liv'd, may purchase Heav'n by arduous toil
Ere death: it is not our's their fate to scan.
[tr. Boyd (1802), st. 24]

Seeing one steal,
Another bring, his offering to the priest,
Let not Dame Bertha and Sir Martin thence
Into heav’n’s counsels deem that they can pry:
For one of these may rise, the other fall.
[tr. Cary (1814)]

Let not Nun Bertha and Saint Martin try,
Seeing one offer, and another steal,
The counsel of the heaven from that to tell:
For this may rise again, and that may fall.
[tr. Bannerman (1850)]

Let not Dame Bertha nor Ser Martin think,
Seeing one steal, another offering make,
To see them in the arbitrament divine;
For one may rise, and fall the other may.
[tr. Longfellow (1867)]

Let not Dame Bertha and Master Martin deem, for seeing one steal, another make offerings, that they are seeing them within the Divine counsel; for that one may be exalted and this may fall.
[tr. Butler (1885)]

Let not Dame Bertha nor Sir Martin deem,
Because they see one rob, another pray,
That they can pry within the will supreme;
For one can rise, and one can fall away.
[tr. Minchin (1885)]

Let not dame Bertha and master Martin, seeing one rob, and another make offering, believe to see them within the Divine counsel: for the one may rise and the other may fall.
[tr. Norton (1892)]

Let not Dame Bertha or Squire Martin think, if they perceive one steal and one make offering, they therefore see them as in the divine counsel; for the one yet may rise and the other fall.
[tr. Wicksteed (1899)]

Let not Dame Bertha and Master Martin, when they see one rob and another make an offering, think they see them within the divine counsel; for the one may rise and the other fall.
[tr. Sinclair (1939)]

Let no Dame Bertha or Sir Martin deem,
Because they see one steal and one give all,
They see as divine forethought seéth them;
For the one yet may rise and the other fall.
[tr. Binyon (1943)]

Let Jack and Jill not think they see so far
That, seeing this man pious, that a thief,
They see them such as in God's sight they are,
For one may rise, the other come to grief.
[tr. Sayers/Reynolds (1962)]

Let not dame Bertha and squire Martin, if they see one steal and one make offering, believe to see them within the Divine Counsel: for the one may rise and the other may fall.
[tr. Singleton (1975)]

Let not every Bertha and Martin think
Because they see one a thief, another respectable,
That they see how they are in the eyes of God;
For one may rise, and the other one may fall.
[tr. Sisson (1981)]

Let not Dame Bertha or Master Martin think
that they have shared God’s Counsel when they see
one rob and see another who donates:
the last may fall, the other may be saved.
[tr. Mandelbaum (1984)]

No Mr. or Miss Know-It-All should think,
when they see one man steal and one give alms
that they are seeing them through God's own eyes,
for one may yet rise up, the other fall.
[tr. Musa (1984)]

Let not dame Bertha and messer Martin believe, because they see one stealing, another offering, that they see them within God’s counsel,
for that one can rise up, and this one can fall.
[tr. Durling (2011)]

Do not let Jack and Jill think, that if they see someone steal or another make offering they therefore see them as Divine Wisdom does, since the one may still rise, and the other fall.
[tr. Kline (2002)]

And so when Mrs Smith and Mr Jones
see one man steal, another offer alms,
don’t let them think they see this in God’s plan.
The thief may rise, the other take a fall.
[tr. Kirkpatrick (2007)]

Let not Dame Bertha and Master Martin,
when they see one steal and another offer alms,
think that they behold them with God's wisdom,
for the first may still rise up, the other fall.
[tr. Hollander/Hollander (2007)]

Let not Mrs. Judy and Mister John,
Seeing one man steal but another before
The altar with offerings, think one is sinful,
The other's in Heaven -- for people rise and fall.
[tr. Raffel (2010)]