time will tell
Sooner or later something will become known or be revealed, as in I don't know whether or not they'll like the reconstruction; only time will tell. This proverbial phrase dates from the early 1500s.
Words nearby time will tell
time travel,
time trial,
time value,
time warp,
time was,
time will tell,
time zone,
time's wingéd chariot,
time-binding,
time-consuming,
time-division multiplex