Prevention is better than cure. Hope for the best and prepare for the worst. Don't throw the baby out with the bathwater. Penny wise, pound foolish. Imitation is the sincerest form of flattery.
Good fences make good neighbours.
There's a first time for everything. Never marry for money but marry where money is. Lend your money and lose your friend. A barking dog never bites. In the country of the blind, the one-eyed man is king.