it is a matter of sowing and reaping. it is all about judgement(the kind we use to determine our own actions) and consequences.
Matthew 7:2
For with what judgment ye judge, ye shall be judged: and with what measure ye mete, it shall be measured to you again.
Mark 4:24
And he said unto them, Take heed what ye hear: with what measure ye mete, it shall be measured to you: and unto you that hear shall more be given.