A fool may be known by six things :anger without cause, speech without profit, change without progress, enquiry without object, putting trust in a stranger, mistaking foes for friends.
My mom always told me that we could never measure our wealth by money but by our friends. She would surely be glad to meet you and know how rich I turned out to be!
How 2 grow friendship? pick a good heart, plant in a pot of trust, water with good thoughts, add some emotions and faith, remove the misunderstanding and nourish it.