A person tends to take on the characteristics of those with whom he or she associates.

Alternative form of who keeps company with the wolf will learn to howl

Synonym of save one's breath to cool one's porridge

A person who has talent, resolve, or moral strength will eventually succeed despite having been overlooked, injured, or defeated.

Third-person singular simple present indicative form of keep one's cards close to one's chest

present participle of keep one's cards close to one's chest

One should be on one's toes and alert of one's surroundings if malicious people are around, to ensure that they cannot wreak havoc in one's life.