The longest day must have an end.

Meaning: Even the most difficult or lengthy struggles will eventually conclude if you endure.

Origin: A consolation sometimes called an Irish proverb: however hard or long a day, it will end. Its first appearance has not been traced.

More proverbs about Perseverance

Never leave a friend in the lurch. — Abandoning someone who depends on you damages trust and reveals your character's weakness…
The master's eye does more work than his hands. — Vigilant oversight and attention accomplish more than physical labor alone.
Medlars are never good till they be rotten. — Unpleasant external conditions sometimes precede inner ripeness; patience reveals hidden…
Time and straw make medlars ripe. — Patience and neglect accomplish what effort cannot; some things require only waiting.
It is never too late to mend. — Mistakes and poor situations remain fixable at any age or stage, no matter how long you'v…
If every one would mend one, all would be mended. — Individual responsibility for self-improvement creates collective progress without relyin…

ври больше (vri bolshe) — An expression of dismissive disbelief; an ironical way of saying someone's story is uncon…
вводить в заблуждение (vvodit' v zabluzhdenie) — To deceive or mislead someone deliberately.
пускаться во все тяжкие (puskat'sya vo vse tyazhkiye) — To abandon restraint and indulge recklessly in vices or wrongdoing without scruple.