Meaning : With good sense or in a reasonable or intelligent manner.
Example :
He acted sensibly in the crisis.
Speak more sanely about these affairs.
Acted quite reasonably.
Synonyms : reasonably, sensibly
Not in a reasonable or intelligent manner.
She reacted unreasonably when she learned she had failed.Meaning : In a sane or lucid manner.
Example :
She is behaving rather sanely these days even though we know she is schizophrenic.
In an insane manner.
She behaved insanely.