We can realize the worth and significance of everything from its achievement and assess its value with the quality and quantity of its fruits. Beyond doubt, everything which is of more fruits will be naturally of more value and everything with least fruits will be of least value.
There may be things which are of abundant results quantitatively but qualitatively they may not be important.
Fortunately, one of the subjects important in terms of quality and quantity is ‘Piety’ or Taqwa. Hence numerous fruits have been mentioned for it in the holy Quran and narrations each of which is significant and worthy by itself.
source : http://www.maaref-foundation.com