There are various ways to say this.
Nothing lasts forever.
This, too, will pass.
You’re stronger than you think.
And many in here: https://www.wiseoldsayings.com/anything-is-possible-quotes/
What is another way to say, ”You’ll get through it.”?
How can I respond to someone who is having trouble staying positive?
2 answers
How do I respond to someone who has difficulties being positive?