Neither a borrower nor a lender be; For loan oft loses both itself and friend, And borrowing dulls the edge of husbandry. This above all: to thine own self be true, And it must follow, as the night the day, Thou canst not then be false to any man. - William Shakespeare
There is nothing that dulls a personality so much as a negative outlook.
Beneath the rust and grime which dulls the shine of our weathered hearts, joy patiently waits to be rediscovered - John Mark Green
Anger dulls the sharpness of mind, hardens the softness of feelings, and replaces the sweetness of the world with bitterness. - Debasish Mridha
Vanity dulls the senses. - Nadja Sam
Egotism is the anesthetic that dulls the pain of stupidity. - Frank Leahy
Neither a borrower nor a lender be; For loan oft loses both itself and friend; And borrowing dulls the edge of husbandry [economy]. - William Shakespeare