Being unaware of the way leading to Allaah, its difficulty and purposes causes many problems and has little benefit, because the person may exert great effort in performing supererogatory duties, while neglecting a religious obligation. He may preoccupy himself with a deed connected with the body, while having something else in the heart, or a deed of the heart, without any action from the body. He may have great determination concerning a deed without observing its purpose. He may perform a deed without being cautious of its evil consequences while performing the deed and after performing it.
He may undertake a deed without acknowledging Allaah’s kindness in it by feeling that he participated in the fulfillment of the deed and not by the Grace of Allaah. It may me a deed where he failed to observe his heedlessness in it and excuse for it. It may be a deed where he did not give its due in full like advice and kindness while thinking he gave its due. All these decrease the fruit of the deed, in addition to a lot of trouble. It is only Allaah who grants success.