"Let not the sun go down upon your wrath" (Ephesians 4:26). It is a decisive rule of every Christian fellowship that every dissension that the day has brought must be healed in the evening. It is perilous for the Christian to lie down to sleep with an unreconciled heart.
On "the day alone":
Many people seek fellowship because they are afraid to be alone. . . . They are generally disappointed.
Dietrich Bonhoeffer, Life Together
from an underground seminary during the Nazi years