Complacency is easy when it is not ourselves being injured — It makes a difference whose ox is gored.

Complacency is the death of excellence

Complacency is the enemy of progress.

Complacency is the death of success. Nothing wilts faster than laurels that have been rested on.

Complexity must be compensated with simplicity.

Complexity is the mother of reinvention

Complexity is that out of which simplicities emerge.

Complexity is often a device for claiming sophistication, or for evading simple truths.

Concentration is the secret of strength in politics, in war, in trade, in short, in all management of human affairs.

Concentration is the secret of strength in all the management of human affairs.

Concentration is difficult -- sometimes our only hope is to be distracted from distraction by distraction.

Concentration is a fine antidote to anxiety.

Conflict is not possible without communication.

Conflict is avoided most on account of mutual respect.

Conflict is inevitable but not necessarily bad.

Conflict is the force that drives a theatrical writer.