The indifference, callousness and contempt that so many people exhibit toward animals — Ashley Montagu
The heart and hand of those who always mete out become callous from always meting out. — Friedrich Nietzsche
The indifference, callousness and contempt that so many people exhibit toward animals — Albert Einstein
Fattened in vice, so callous and so gross, he sins and sees not, senseless of his loss. — John Dryden
To kill [children in the womb] makes us all the poorer, insensitive, calloused and jaded. — Sam Brownback
Undoubtedly we render our consciences callous by evil indulgences; but we cannot — Henry Ward Beecher
…their callous indifference to the plight of children streaming across the border, — Debbie Wasserman Schultz