From WordNet (r) 3.0 (2006) :
sanely
adv 1: with good sense or in a reasonable or intelligent manner;
"he acted sensibly in the crisis"; "speak more sanely
about these affairs"; "acted quite reasonably" [syn:
sanely, sensibly, reasonably] [ant: unreasonably]
2: in a sane or lucid manner; "she is behaving rather sanely
these days even though we know she is schizophrenic" [ant:
crazily, dementedly, insanely, madly]