A God is one who is obeyed and not disobeyed, by way of fear, magnification, love, fear, hope, reliance, asking him and supplicating to him. All of this is only allowed for Allah, Mighty and Magnificent.

Ibn Rajab, The key to paradise, p 40

When the heart is filled with love for Allah, then there is no more room left in it for it to take on board the desires of the soul.

Ibn Rajab, The key to paradise, p 53

As one’s knowledge of Allah increases, so too does one’s sense of embarrassment before his closeness and sight.

Ibn Rajab, The key to paradise, p 64

Whoever loves something and follows it, making it is his goal and objective, basing his allegiance and enmity on it, has worshiped it.

Ibn Rajab, The key to paradise, p 43

Whoever is truthful in his creed (“None has the right to be worshiped but Allah”) will not love any but Him. He will not hope in any but Him. He will not fear any but Him. He will not place his reliance on any but Him. Any bit of his desires and giving preferences to his soul will then vanish. However, let it not be assumed that the lover (to Allah) is required to be error-free, rather it is required of him to make compensations for his errors.

Ibn Rajab, The key to paradise, p 61

The dead heart. This is the heart that contains no life. It does not know it’s Lord and it does not worship Him by obeying with His command and doing that which He loves and is pleased with. Instead,it is a slave to its bodily desires, temptations, and pleasures…Whether they lead to the displeasure of its Lord and His anger or not. Therefore it worships other than Allah. It directs its love, hope, pleasure, glorification, and submission to other than Him. If it loves, it loves for the sake of its base desires, it if hates, it hates for the sake of its base desires.

Ibn Rajab, The key to paradise, p 90

None will be victorious tomorrow except for one who meets Allah with a sound heart.

Ibn Rajab, The key to paradise, p 55