As I understand; based on what I know
D'après ce que je comprends; selon ce que je sais (D'apres ce que je comprends; selon ce que je sais)
"As far as I can tell, everything is fine."
"D'après ce que je comprends, tout va bien." (D'apres ce que je comprends, tout va bien.)
to have a personal reason to complain or criticize
the most important fact or result
to reach the lowest point before improving
to think creatively or unconventionally
to irritate or annoy someone very much
to make people recognize your authority