Cheer up! the worst is yet to come!
Notes from Wikiquote
Cf. Richard Baxter, A Saint or a Brute (1662), p. 60: "Take not their judgements that neither have seen nor yet foresee the end; the worst is yet to come with them." Matthew Mead, Solomon's Prescription (1666), p. 83: "All danger over? No, hold there, Sinner; God hath not done with thee so, believe it, the worst is yet to come."