I like to understand human motives, and sometimes they defy reasonable explanation.

Despite the huge amounts of power involved, there were still human motives and actions behind what had happened so long ago.

Who shall set himself up to judge human motives.

Small human motives, all dwarfed by the huge scale of events.

You left out one of those basic human motives for violence before.

Some natural skepticism as to the purity of all human motives came and sat upon my chest.

To these normal human motives must be added political and jurisdictional ones.

These creatures were nonhuman, and one should not try to give them human motives.

It is certainly not the case that all human motives reduce to the desire for offspring.

Or perhaps it was unfair to attach to her any human motives.