(Trees are supported by roots, and man - by his friends.)
http://www.sras.org/russian_mini_lessons_2006

Remember, the greatest gift is not found in a store nor under a tree, but in the hearts of true friends. -- Cindy Lew
http://www.indianchild.com/friendship_quotations.htm

Или переделать эту:
A youth that does not cultivate friendship with the elderly is like a tree without roots
( Ntomba proverb)
A man who does not cultivate friendship is like a tree without roots
http://www.twoodtrust.com/proverbs.htm

BACK, n. That part of your friend which it is your
privilege to contemplate in your adversity.

FRIENDLESS, adj. Having no favors to bestow. Destitute
of fortune. Addicted to utterance of truth and common sense.

FRIENDSHIP, n. A ship big enough to carry two in fair weather,
but only one in foul.

The sea was calm and the sky was blue;
Merrily, merrily sailed we two.
(High barometer maketh glad.)
On the tipsy ship, with a dreadful shout,
The tempest descended and we fell out.
(O the walking is nasty bad!)

Armit Huff Bettle