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:
Note 2 at Mr 12:43: Mark made it very clear that Jesus used this instance to teach His disciples a very important lesson, but He did not say these things to this widow personally. God's promises concerning giving give us an assurance that this offering was blessed back to this woman in this life (Mr 10:28-30 and Lu 6:38), but His commendation that we read here was not heard by the widow. There is no indication that this poor widow ever knew anyone recognized the extent of her sacrifice.
Likewise, there are times when we may feel that no one knows or appreciates our sacrifices. However, just as surely as Jesus saw this woman's giving and knew of the sacrifice involved, God takes note of our smallest deeds (see note 6 at Mt 10:42) and will one day reward us openly (Mt 6:4).