at one's mercy

Here one has everybody one ever knew, except those who escape by emigrating, simply at one's mercy on a bicycle.

All eyes opened wide and became keen, for it is gratifying to examine the oppressor closely, have him—on paper at least—in one's hands, at one's mercy.

The standard of humanity or of decent behavior, especially towards the weak or those persons who may be at one's mercy, or animals, is entirely in the mores of the group and time.

One should be considerate of the feelings of a dumb beast placed at one's mercy.

I never expected to have to fight the beasts unarmed," Beric said, "but I had sometimes thought what should be done in such a case, and I thought that if one could but wrap one's cloak round a lion's head the beast would be at one's mercy.