High Level Programming Languages

When is it appropriate to use a high level programming language? Personally, I always feel guilty when using anything except C.

>>1
Just use a compiler that translates the code into C. Chicken(Scheme) does that very well. No need to be ashamed.

>>2
I wholeheartedly agree, esp. if you got started on C first.

>>3
Then test systems for that. Valgrind, cgdb, DynamoRIO, etc.:
https://en.wikipedia.org/wiki/Dynamic_program_analysis
https://en.wikipedia.org/wiki/List_of_tools_for_static_code_analysis
There was a FreeBSD one is used to use allot, but forgot the name. Its trusted across many companies, including IBM and Oracle.

However, you can also use Dependently typed languages:
Coq, ATS, Agda, etc.