If your friend is critical [of your work], you have to have a very thick skin and a thick skin is something that only builds up after it's callused for awhile.
![If your friend is critical [of your work], you have to have a very thick skin and a thick skin is something that only builds up after it's callused for awhile.](http://cdn.quoteddaily.com/images/damon-lindelof/if-your-friend-is-critical-of-your-work-you-have-to-have-a-very-thick-skin-and-a-thick-skin.jpg)
If your friend is critical [of your work], you have to have a very thick skin and a thick skin is something that only builds up after it's callused for awhile.