This is a great quote by Roy H Williams in his book The Wizard Of Ads. This book was filled with little gems all the way through. A great read.
From page 181
Should any person every ask my sons what is important to their father, I’ll wager that my boys will be to recite it verbatim.
"Boys, when you're ready to marry, don't marry a person who has high and lofty exceptions of you. Don't marry the girl you've struggled to impress. Marry the girl you always thought of as sister, the one who knows you as you really are. Marry the girl who has seen every fault and weakness but likes to be with you just the same. Boys, when you're ready to get married, I hope you'll marry your best friend."
Roy H Williams