Today's Gospel reading at Mass comes from Mark 12. First, Jesus pointed out how the scribes liked to go around in long robes, accepting greetings in the marketplaces and seats of honor at banquets, devour the houses of widows and, as a pretext, recite lengthy prayers ~ they would receive a very severe condemnation. We are not scribes, but in our own way we might have acted like them too ~ we'd better watch out.
In the second part of the reading, Jesus gave us an example in contrast to the scribes above. He observed that a poor widow, from her poverty, put two small coins worth a few cents into the temple treasury ~ she contributed all she had, her whole livelihood! Jesus pointed out that this poor widow put in more than all the other contributors to the treasury, who had contributed from their surplus. It's true that the wealthier we are, the harder it is to let go. Such attachment to wealth prevents us from becoming selfless.