A polite formula used when being introduced to somebody.

(idiomatic, dialect, slang) Indicates agreement, approval, encouragement.

(formal) A greeting used upon being introduced to someone. Alternatives are pleased to meet you and nice to meet you. (Sometimes used as a rhetorical question among familiar parties, depending on the region).

(UK, euphemistic) A difficult situation

Alternative form of you can't judge a book by its cover

Do not dedicate all your resources to one project. / Do not count on any one thing to safeguard what is valuable.

You can't have it both ways.

Begins a polite request; used on behalf of more than one speaker.

(idiomatic) Expresses support, agreement, certainty or emphasis. / (idiomatic, informal) Certainly, you're welcome; a reply to thank you or to a request.

If you cannot handle the pressure, you should not remain in a position where you have to deal with it.