Purifing the soul

As we know this world is a place of trial and test whereas the hereafter is ever-lasting reward. It is a must that every believer has knowledge of the insignificant and lowly nature of this world and that which is to come in the hereafter of bliss, also that the believer should take from this life as to benefit themselves in the next. There is no path to bliss except through knowledge and action. Correct knowledge based upon the book of Allah and the Sunnah of his messenger and righteous action; this is the path to success upon which were the messengers, so action without knowledge is of no benefit likewise knowledge without action is also of no benefit. so the salaf would gather between these two fundamentals.