Never give up.

Recognize your talents through self identification if necessary. 
And never give up, that is my advice to those who are struggling trying to achieve their goals. 

There are lots of things I don't understand.

I think it is important for me to just accept that. 

Vocab from Toast Documentary 4-5

짜증-bad temper, irritability
짜증을 내다= show temper
의미=significance
뇌물=bribe
뇌물을 받다= receive/accept/take a bribe (from)
뇌물을 주다= bribe a person
야무지다=be sturdy
기특하다=be praiseworthy

single out/pick/select

가리다-single out/sort out/select
You must be careful in choosing your friends.
친구는 잘 가려서 사귀어야 한다. 

(choose your friends well, then you have to make friends.)  literal translation I think.