“A gem cannot be polished without friction, nor a man perfected without trials.”
Chinese Proverbs quotes

May you have enough happiness to make you sweet, enough trials to make you strong, enough sorrow to keep you human enough hope to make you happy.”

That which causes us trials shall yield us triumph: and that which make our hearts ache shall fill us with gladness. The only true happiness is to learn, to advance, and to improve: which could not happen unless we had commence with error, ignorance, and imperfection. We must pass through the darkness, to reach the light.”
Albert Pike quotes

The fiery trials through which we pass will light us down in honor or dishonor to the latest generation.”
Abraham Lincoln quotes

“What seems to us as bitter trials are often blessings in disguise” Oscar Wilde