Right. Jesus refers to YOUR cross.
So much for those who say that Jesus’ suffering is ALL-sufficient, that he did ALL the redemptive suffering ENTIRELY by himself, and therefore there is no need for the individual Christian to do ANY suffering.
If our death to self by taking up our cross could work salvation, then Christ died for nothing.
If His work as the Son of God is not enough to save us in and of itself, then nothing we as sinful, mortal humans can do can add to that because our works are stained by sin and are completely inadequate to save us or contribute to it.
If our works are necessary, then you are saying that the death of Jesus on the cross is inadequate, it is not enough to save us.
If that’s the case, then NOTHING is enough to save us.