take it on oneself
take it upon oneself

You couldn't say just how, but still he was taking it upon himself.

Had she the right to take this much risk upon herself?

This is an idea whose time has come and action should be taken upon it.

He was working for an insurance company after taking it upon himself to cut a student's hair.

She runs the whole house and takes far too much upon herself.

He took it upon himself to follow them when they left.

I took it upon myself to say that he should come and ask you himself.

But the fight had taken a new and a strange turn upon the other side.

She takes it upon herself to keep records and research the school system.

We became a team where every individual took it upon himself to just do his job and not wait for or worry about someone else.