人はいざ知らず私はの英語

He does not know it himself.

an unselfish person

He is an irresolute man

I don't know who it is.

By mine own heart I know how dear

I don't know, either.

My heart to such a mood;

not knowing anybody

I don't know either

I don't know

a worthless person

What a restless man you are!

a person who is imprudent

Nobody can tell.＝Who can tell?

I do not know, either.

You should not despise people―regard people with contempt―hold people in contempt.

a thoughtless person

an ungrateful person

an insane person

not understood by others

How should I know?

He is a restless man―a fidgety man.

a person who lacks common sense

You should not meddle in others' affairs.

That's no business of mine―none of my concerns.

We are short of hands―short-handed.

You can search me!

of the person in question, the condition of not being informed

He has no ideas at all.

a person who does nothing