(idiomatic, sometimes humorous) A stereotypical request from a hiring organisation to a potential candidate, suggesting that the candidate will not be hired.

Alternative form of you don't dip your pen in company ink

(chiefly UK) Synonym of don't call us, we'll call you

(idiomatic) A situation where either choice results in a negative outcome; dilemma.

Synonym of you don't dip your pen in company ink

Facts exist as they do independently of emotional biases.

A sarcastic response to when someone is told something obvious

Alternative form of don't teach your grandmother how to suck eggs

One should not depend upon a favorable (and typically overoptimistic) outcome to one's plans until it is certain to occur.

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