A friend is a person who always understands your preoccupations, even when other people do not perceive them at all.

Do not choose friends who only flatter you, but who understand you. True friendship implies willingness to speak frankly, to point out the mistakes we made and to exchange opinions freely.

The older the friendship, the stronger the trust.

True friendship doesn't include jealousy.

The key to successful social behaviour: be approachable and understand the needs of others.

Do not look for company at all costs, and especially do not allow loneliness to lead you to fickle love or false friendship.