“Be an opener of doors”
“Loneliness opens the door for wisdom and wisdom opens all the doors!”
“Open the door by yourself instead of waiting the door to be opened by itself!”
“Every door is a door opening to another door!”
“Good manners open the closed doors; bad manners close the open doors!”
“Elizabeth's voice had a door in it. When you opened that door you found another door, and that door opened yet another door. All the doors were nice and led out of her.”
“An open mind is as welcoming as an open door.”