A truth spoken before its time is dangerous.

He who waits for a dead man's shoes is in danger of going barefoot

Do not stand in a place of danger trusting in miracles.

You are permitted in time of great danger to walk with the devil until you have crossed the bridge.

A person's character is revealed by their speech

Poor in my youth, and in life's later scenes - Rich to no end, I curse my natal hour, Who naught enjoyed while young, denied the means; And naught when old enjoyed, denied the power