There's many a slip 'twixt the cup and the lip.

There's many a slip twixt cup and lip

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

Success has many friends

If you do not have brains you have legs.