against nature

But it was against his nature to give out free information.

Do not try to work against nature just because a plant is pretty.

I try not to do things that are against nature.

It went against his very nature to give in to fear.

He thought: Never mind all that about how a man can't run against his nature.

And it was wrong to expect him to go against his nature.

It was against his nature to let himself be taken without a fight.

I know it goes against human nature, but that's the way to make money.

It was against human nature to sit still and do nothing in the face of death.

"It just goes against his nature to say something simple."