Originally Posted by SandraT
You know what, Vicente? I just remembered this song by Julio Iglesias that goes "...tropecé de nuevo con la misma piedra..." and you were previously referring to a song.
In this case it means he made the same mistake twice. I think in this song he refers to falling in love with a person that didn't deserve his love or didn't love him or abandoned him...and then doing it again...poor guy!
And about tit for tat, yes.
this for that: phrase used when someone pays back one wrong or injury with another