When you wish to instruct, be brief; that men's [children's] minds take in quickly what you say, learn its lesson, and retain it faithfully. Every word that is unnecessary only pours over the side of a brimming mind.
Just as the soul fills the body, so God fills the world. Just as the soul bears the body, so God endures the world. Just as the soul sees but is not seen, so God sees but is not seen. Just as the soul feeds the body, so God gives food to the world.
Friendship, on the other hand, serves a great host of different purposes all at the same time. In whatever direction you turn, it still remains yours. No barrier can shut it out. It can never be untimely; it can never be in the way. We need friendship all the time, just as much as we need the proverbial prime necessities of life, fire and water.
To give and receive advice - the former with freedom, and yet without bitterness, the latter with patience and without irritation - is peculiarly appropriate to geniune friendship.