“this poor widow put in more than all the other contributors to the treasury; for they gave out of their surplus, but she, out of her poverty, gave all she owned, all she had to live on.” - Mark 12:43-44
We have historically assumed Jesus is commending the widow’s example to us. We typically interpret the significance of the story just like Joy Allmond does on the Billy Graham Evangelistic Association blog:
What matters to God is our heart toward our money and our possessions. Do we see them as ours, or as His? Regardless of how much we give to Kingdom work–whether it is $10 or $10,000–Jesus makes it obvious to us in Luke 21:1-4 [the story of the Widow’s mite] that He is most pleased with those who had to sacrifice to give that $10. What is your “mite?” Are you sowing sacrificially from your resources?