Things are not as bad as they seem.

One should put one's mental faculties to good use.

Alternative form of one of those things

At any cost; for certain; indicates the speaker is determined, resolute in doing something.

A small amount of knowledge can mislead individuals into believing that they are more experienced and expert than what is actually the case.

A succession of things that are tedious, problematic, or otherwise unwanted.

Alternative form of all things to all people

(idiomatic) Someone or something that entirely satisfies the expectations of everyone, no matter how diverse and conflicting those expectations may be.

The most valuable things in life (e.g.: friendship, courtesy) cost nothing.

If an unfortunate event has already occurred twice, a third unfortunate event is likely to occur.