Imaam Al-Awzaa’ee (rahimahullaah) said:
”A man does not innovate (in the religion) except that he is deprived of his wara (i.e. that fear of Allaah keeping him away from doubtful matters or affairs he fears may ruin his afterlife)” [Siyar 7/125]
Thaabit Al-Bunaanee said: Abu Ubaidah said, ”O people! Indeed I am a person from Quraish. And there is no red or black skinned person amongst you who considers me to be more fearful of Allaah than him, except I wish that I am like him (because he humbled himself by considering me more virtuous) [Siyar A’laam Nubulaa: 1/81]
Qabeesah Bin Qais Al-Anbaaree (rahimahullaah) said: When evening approached Dahhaak Bin Muzaahim used to weep; so he was asked:”What makes you weep?” He said: ”I do not know which of my deeds will be raised today (i.e. accepted by Allaah)” [Sifatus Safwa: 4/150]
In The Name of Allaah, The Most Merciful, The Bestower of Mercy
Aa’isha [radiyallaahu-anhaa] said: I ask the Prophet (sallal-laahu-alayhi-wasallam) about this Ayah:
[وَالَّذِينَ يُؤْتُونَ مَا آتَوْا وَقُلُوبُهُمْ وَجِلَةٌ – And those who give that (their charity) which they give (and also do other good deeds) with their hearts full of fear] [23:60]; are they those who drink alcohol and commit theft?” He [sallal-laahu-alayhi-wasallam] said: ”O daughter of Siddeeq! Rather they are those who observe fasting, perform prayer and give charity, whilst fearing that their deeds will not be accepted from them.” [Reported by Imaam Tirmidee Number: 3175]
Hasan Al-Basri [rahimahullaah] said: ”The believer combines between perfection (in worship) and fear (that his deeds will be rejected); and the hypocrite combines between evil (deeds) and feeling safe from [Allaah’s punishment]” [Madaarij As-Saalikeen: 1/512]
Maalik Bin Deenaar (rahimahullaah) said: ”A sign of having love for Allaah is (one’s) constant remembrance of Him; because whoever loves a thing will remember it a lot.” [Shu’ab Al-Eemaan: 1/388]
Yoosuf Ibn Asbaat (rahimahullaah) said: ”Purification of the intention from (what) corrupts it is harder upon the performers of (acts of worship) than prolonged striving (worship)” [Jaami al-Uloom Wal-Hikam: page:14]
Khaalid Ibn Mi’daan (rahimahullaah) said: ”if a door of good is opened for one of you hurry towards it; because he does not know when it will be closed. [Hilyatul Awliyaa: 5/211]
In The Name of Allaah, The Most Merciful, The Besower of Mercy
”When death approached Amr Bin Qais Al-Malaa’iy (rahimahullaah) he wept; so his companions said to him: ”What makes you weep about the worldly life, for by Allaah you have been modest during your life.” He said: ”By Allaah, I am not weeping over the worldly life, rather I weep fearing that I will be deprived of the goodness of the hereafter.” [[Shu’ab Al-Imaan 1/508]
Maalik Bin Deenaar (rahimahullaah) said: ”When a slave (of Allaah) seeks knowledge to act upon it, it withholds him (from evil and guides him towards good). And when he seeks it for other than acting upon it, it increases him in boasting.”
[source: اقتضاء العلم العملpage:33]
Imaam Ahmad said: ”When a man knows himself, the speech of the people is of no benefit to him.” [Siyar: 11/211]