If you turn the crack, you change the subject of a conversation.
A man of God is a clergyman.
If you have a trick up your sleeve, you have a secret strategy to use when the time is right.
Touch is a zone of the playing field in Rugby. Kicked to touch means the ball was put safely out of play. Idiomatic usage usually means a person has deftly avoided an issue in argument.
If you catch hell, you get into trouble or get scolded. ('Catch heck' is also used.)
A man of letters is someone who is an expert in the arts and literature, and often a writer too.
If you search every nook and cranny, you look everywhere for something.
If you quit you will never get what you want, but if you keep trying you will find a way to get what you want. ('Quitters never win, winners never quit, but those who never win and never quit are idiots' is a variation accredited to Larry Kersten)
Justice is blind means that justice is impartial and objective.
Achievements require some sort of sacrifice.