The cause is hidden. The effect is visible to all.Ovid
“Dripping water hollows out stone, not through force but through persistence.”
Poet · 43 BC – 17
Ovid was a Roman poet celebrated for the Metamorphoses, a vast narrative poem of mythological transformations. Exiled by the emperor Augustus to the Black Sea coast, he spent his last decade writing poems of lament and endurance.
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Let your hook always be cast; in the pool where you least expect it, there will be a fish.Ovid

Be patient and tough; someday this pain will be useful to you.Ovid
Chance is always powerful. Let your hook be always cast; in the pool where you least expect it, there will be a fish.Ovid
All things change; nothing perishes.Ovid
Take rest; a field that has rested gives a bountiful crop.Ovid

Be regular and orderly in your life, so that you may be violent and original in your work.Gustave Flaubert
The mind unlearns with difficulty what it has long learned.Seneca