All friends who have passed the test should closely unite around you. -Shakespeare
People together can do things that a single person can't do; Wisdom, hands and strength together are almost omnipotent. -Webster
Man can't live alone, he needs society. -Goethe
Single people are weak, just like wandering Robinson. Only when he is with others can he accomplish many things. -Schopenhauer
Those who despise the people around them will never be great. -Zuo Mo
Without unity, any force is weak. -Lafontaine
Disagreement between friends is an opportunity for the enemy to attack. -Aesop