How to check if the file is a binary file and read all the files which are not?

Question

How can I know if a file is a binary file?

For example, compiled c file.

I want to read all files from some directory, but I want ignore binary files.

Answer 1

I use

! grep -qI . $path

Only drawback I can see is that it will consider an empty file binary but then again, who decides if that is wrong?