Firstly, the guilt offering is in regards to holy things, anything related to the tabernacle and its rituals (14-16). For example, if someone fails to bring an offering at its appointed time, they must bring a guilt offering. The required offering is a ram, which is valuable. Also, they must add a fifth of the value to cover the offering they had missed or whatever harm they had done to holy things. Offering more was a sign of genuine repentance and a desire for restitution and to live under God's mercy and grace of restoration.
Secondly, the guilt offering is in regards to not doing something according to the law, even unknowingly (17-19). "I didn't know," is not an excuse. Once we realize we are wrong, we must admit our guilt and take responsibility.
Thirdly, the guilt offering is in regards to neglecting, damaging, or stealing your neighbor's property (6:1-7). Have you ever kept something you found? It's a form of stealing. We must return what we found and make restitution if we cheated others or damaged their belongings. Zacchaeus the tax collector practiced this (Lk 19:8).
Application: Father, thank you for your Son Jesus who removes my guilt. I praise you and offer my life to you. Use my life for your glory.
One Word: Jesus' death on the cross takes away all our guilt and shame and restores us.