A deserted man holding on to a wooden board ...

"A deserted man holding on to a wooden board in the middle of the sea being tossed to and fro by waves is not in any more need of Allah than you are, sitting where you are.“
-Ibn Qudāmah

Anger is like a ball of fire

“Anger is like a ball of fire, but if you swallow it, it’s sweeter than honey.”

`Ali Ibn Abi Talib (Radhi ALLAHu 'Anhu)

don’t look at him as a sinner

"If one night you see someone committing a sin, tomorrow don’t look at him as a sinner, he may have repented during the night and you didn’t know." -Ali (R.A)

The hypocrite looks for faults

"The hypocrite looks for faults; the believer looks for excuses." -Imam Al Ghazali

Indeed, the hardships of obedience to Allah shall go

“Indeed, the hardships of obedience to Allah shall go and the reward of the good deeds will stay, and indeed, the joy of the sins shall go and its punishment shall stay.”
-Ibn-Al-Jawzee

Do not abandon the Invocation (Dhikr)

Do not abandon the Invocation (Dhikr) 
because you do not feel the presence of Allah therein. 
For your forgetfulness of the invocation of Him is worse than
your forgetfulness in the invocation of Him."

{Ibn Ata'Allah rahimahullah}

If you want to know what's inside the heart of a person

"If you want to know what's inside the heart of a person you should listen to what comes out from his mouth."

~ Ibn Al Qayyim Al Jawziyah rahimahullah

The believer hides the faults of others

“The believer hides the faults of others and gives sincere advice whereas the wicked evil embarrass and disgrace others.”
— Fudayl ibn ‘Iyaad

Don't be so sweet that people swallow you up

"Don't be so sweet that people swallow you up, nor so bitter that they spit you out" 
- Luqman (The Wise)

No deed is lighter than Dhikr

"No deed is lighter than Dhikr, richer in taste and more pleasing to the heart than Dhikr."

[Ibn Al-Qayyim]

books are better than the castles of the kings

al-Ansari: 

"To me, books are better than the castles of the kings."

(al-Majmu' 1/395)

Politeness is part of the attitude of the believers

"Politeness is part of the attitude of the believers, and it is lowering the wing of humility to people, speaking gently, and not speaking harshly to them, which are among the best means of creating harmony."

-Ibn Battaal (Fath al-Baari 10/528)

Declare your Jihad on thirteen enemies.

“Declare your Jihad on thirteen enemies.
What you cannot see:
Egoism, Arrogance,
Conceit, Selfishness, Greed, Lust, Intolerance, Anger, Lying, Cheating, Gossiping and Slandering. 
If you can master and destroy them, then you will be ready to fight the enemy you can see.”

Imam al Ghazali

completely trust in God is to be like a child

"To completely trust in God is to be like a child who knows deeply that even if he does not call for the mother, the mother is totally aware of his condition and is looking after him." - Imam al-Gazali

..Don’t take someone’s silence as his pride,..

“Don’t take someone’s silence as his pride, perhaps he is busy fighting with himself”

— Ali Ibn abi Talib r.a

Speak the truth even if it is against yourself

Luqmaan said to his son “Speak the truth even if it is against yourself and do not care about who is getting angry”

— [Aadab ush-Share’ah 1/74]