2 quotes about slights follow in order of popularity. Be sure to bookmark and share your favorites!

A good conscience fears no witness, but a guilty conscience is solicitous even in solitude. If we do nothing but what is honest, let all the world know it. But if otherwise, what does it signify to have nobody else know it, so long as I know it myself? Miserable is he who slights that witness.

Seneca

All important persons have about them someone in a subordinate position who has their ear. These dependents are very susceptible to slights, and, when they are not treated as they think they should be, will by well-directed shafts, constantly repeated, poison the minds of their patrons against those who have provoked their animosity. It is well to keep in with them.

W. Somerset Maugham