To think straight, it is advisable to expect all qualities and attributes, adjectives, and so on to refer to at least two sets of interactions in time. Gregory Bateson
The exercise of power is determined by thousands of interactions between the world of the powerful and that of the powerless, all the more so because these worlds are never divided by a sharp line: everyone has a small part of himself in both. Václav Havel
There should be more sincerity and heart in human relations, more silence and simplicity in our interactions. Be rude when you're angry, laugh when something is funny, and answer when you're asked. Anton Chekhov
If we are to understand the interactions of a large number of agents, we must first be able to describe the capabilities of individual agents. John Henry Holland
nonlinear interactions almost always make the behavior of the aggregate more complicated than would be predicted by summing or averaging. John Henry Holland
People don't realize that molecules themselves are somewhat hypothetical, and that their interactions are more so, and that the biological reactions are even more so. Kary Mullis