Have you ever considered that Jesus may have pointed out the widow who had given her last two mites to amplify the greed of the temple authorities?
Consider the context:
38 And he said unto them in his doctrine, Beware of the scribes, which love to go in long clothing, and love salutations in the marketplaces,
39 And the chief seats in the synagogues, and the uppermost rooms at feasts:
40 Which devour widows’ houses, and for a pretence make long prayers: these shall receive greater damnation.
41 And Jesus sat over against the treasury, and beheld how the people cast money into the treasury: and many that were rich cast in much.
42 And there came a certain poor widow, and she threw in two mites, which make a farthing.
43 And he called unto him his disciples, and saith unto them, Verily I say unto you, That this poor widow hath cast more in, than all they which have cast into the treasury:
44 For all they did cast in of their abundance; but she of her want did cast in all that she had, even all her living. ~ Mark 12:38-44; See also Luke 20:46- 21:4
According to the law of Moses, this widow should have been supported by the giving that came into the temple treasury, rather than giving all of her living into it.
After this occurred, the disciples attempted to speak of the beauty of the temple, but Jesus began to warn them of its destruction because of the corruption therein.
There is nothing in the context that indicates that Jesus pointed out her giving as an example to follow, but this is the kind of theology we get when the take a scripture out of its setting and preach or teach it independently of the context to which it belongs.