Saadi

A little and a little, collected together, become a great deal; the heap in the barn consists of single grains, and drop and drop makes an inundation.
Saadi - On the Excellence of Contentment
Better hold the hand for coin, though small, Than lose, for one half a dang, it all.

Nothing is so good for an ignorant man as silence; and if he was sensible of this he would not be ignorant.

O wise man, wash your hands of that friend who associates with your enemies.

The bad fortune of the good turns their faces up to heaven; the good fortune of the bad bows their heads down to the earth.

Whatever is produced in haste goes hastily to waste.
Saadi - On the Duties of Society
Tell no one the secret that you want to keep, although he may be worthy of confidence; for no one will be so careful of your secret as yourself.
Saadi - On the Duties of Society
He that has acquired learning and nor practised what he has learnt, is like a man who ploughs but sows no seed.

Reveal not every secret you have to a friend, for how can you tell but that friend may hereafter become an enemy. And bring not all mischief you are able to upon an enemy, for he may one day become your friend.

Roam abroad in the world, and take thy fill of its enjoyments before the day shall come when thou must quit it for good.

Nothing is so good for an ignorant man as silence; and if he was sensible of this he would not be ignorant.

- Saadi