Jesus measures generosity in terms of the sacrifice made

Jesus sat down opposite the place where the offerings were put and watched the crowd putting their money into the temple treasury. Many rich people threw in large amounts. But a poor widow came and put in two very small copper coins, worth only a few cents.
Calling his disciples to him, Jesus said, “Truly I tell you, this poor widow has put more into the treasury than all the others. They all gave out of their wealth; but she, out of her poverty, put in everything—all she had to live on.” Mark 12:41- 44 (NIV)
We tend to measure generosity in terms of the amount given
Jesus measures generosity in terms of the sacrifice made