I recently was sorting through old books and a page of quotes fell open:

“The real test of friendship is: Can you literally do nothing with the other person”? Can you enjoy together those moments of life that are utterly simple? They are the moments that people look back on at the end of life and number as their most sacred experiences.” - Eugene Kennedy (?)

and this one, which is a little obscure but I think particularly true as well:

“As close as marbles in a bag we touch each other: the close touch of dearest love, of treasured friendship of brother and sister, husband and wife, parent, child and grandchild.  We touch one another like marbles. In the touching, as with marbles, our point of contact is so small that geometry knows no formula to compute the minuteness of the touching points. It is a challenge to know thyself. But it is an even greater challenge to know another.” - Paul R. Beall (also, who?)