All your strength is in your union,
All your danger is in discord. [ Longfellow ]

Discord oft in music makes the sweeter lay. [ Spenser ]

This is the slowest, yet the daintiest sense;
For even the ears of such as have no skill,
Perceive a discord, and conceive offence;
And knowing not what's good, yet find the ill. [ Sir John Davies ]

The sweetest noise on earth, a woman's tongue;
A string which hath no discord. [ Barry Cornwall ]

The harmony of things, as well as that of sound, from discord springs. [ Sir J. Denham ]

Only concord makes us strong and great; discord overthrows everything. [ Gellert ]

In seasons of tumult and discord, the worst men have the greatest power. [ Tac ]