To be of use and to know how to show yourself of use, is to be twice as useful. - Baltasar Gracián

Some people belong entirely to others ... They have not a day, not an hour to call their own, so completely do they give themselves to others. This is true even in matters of understanding. Some people know everything for others and nothing for themselves.

Don't be brittle as glass in dealing with people. And especially with friends. Some people crack easily, revealing their fragility. They fill up with offence and fill others with annoyance. They reveal a nature so petty and sensitive that it tolerates nothing, in jest or in earnest. The slightest thing offends them, so insults are never necessary. Those who have dealings with them have to tread carefully, always attending to their sensibilities and adjusting to their temperaments, since the slightest snub annoys them. They are completely self-centred...

Though such authority and respect shouldn't be handed to all and sundry, have in caution's innermost room a confidant, a faithful mirror, whose correction you value when disillusionment is necessary.