Do you want a collection of brilliant minds or a brilliant collection of minds?
— Meredith Belbin
Practical Teamwork In Education quotations
Most teams aren't teams at all but merely collections of individual relationships with the boss. Each individual vying with the others for power, prestige and position.

A single leaf working alone provides no shade.

Most great learning happens in groups. Collaboration is the stuff of growth.
Team members who feel threatened but who are not aware of it become rigid - and that stops teamwork.
Teams, not individuals, are the fundamental learning unit in modern organizations. This is where the "rubber stamp meets the road"; unless teams can learn, the organization cannot learn.

Everyone is needed, but no one is necessary.
If I could solve all the problems myself, I would.
A demanding performance challenge tends to create a team.

The same dynamics that promote performance also support learning and behavioral change.
Fun is only real and sustainable if it feeds off the team's purpose and performance aspirations.
Synergism is the simultaneous actions of separate entities which together have greater total effect than the sum of their individual effects.

Without forgiveness, there can be no real freedom to act within a group.
Achieving vulnerability-based trust (where team members have overcome their need for invulnerability) is difficult because in the course of career advancement and education, most successful people learn to be competitive with their peers, and protective of their reputations. It is a challenge for them to turn those instincts off for the good of the team, but that is exactly what is required.