Matthew 6:6: But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly.
Theodore Cuyler quote excerpted:
This is faith*s stronghold; here she weapons herself for the daily conflict. Silence in that closet of prayer bespeaks death throughout all the house. When that door is suffered to rust on its hinges, and that chamber is deserted, then . . . (the stronghold) is soon retaken by Satan, . . .