Whenever you are asked about a thing which you do not know...
Whenever you are asked about a thing which you do not know, express your ignorance plainly. Look! Never give judgment in a matter about which you do not know fully well. A day will come when some Heaven-dwellers will tell some Hell-dwellers, "What is the reason that we have entered the Heaven on account of your teachings and exhortations, but you have gone to Hell?" In response to it they will say, "We ordered others to do good but did not do that ourselves". Allah has many rights on you.
In order to acquit yourself of them you should ask for His forgiveness at bed time as well as when you get up in the morning. Death is after you and it may come any time. Hence, you should do good deeds and do them with hastiness, and listen! As one sows so one reaps. Wheat is grown of wheat and barley of barley. Forget not the retribution for your actions. Abstemious people are commanders and the jurists are leaders. There is a limitless benefit in their company.
A believer considers a sin a huge burden like a mountain. He feels as if he is being pressed by a mountain. But the unbeliever regards a sin as a fly on the nose. Do not look at the smallness of a sin but see against whom you are committing the sin. The self of the believer is more restless in this world than the bird caught in your net. He wants to get out of it as quickly as possible.
It is not advisable to interfere in every matter and you should control your tongue in the same way as you protect your food. Allah has made prayers the coolness for my eyes. O Abu Dharr! The hungry eats food to his fill and the thirsty drinks water to satiety, but I am not satiated with prayers. As long as you are offering prayers you are, as if, knocking the door of an Absolute Monarch. You should know that, by knocking constantly, the door opens at last. Do not make your house a grave.
I asked him, "O the Messenger of Allah! What is Khumul?" He replied, "It means to remember Allah in secrecy". Allah says, "My slave is one who fears Me.