Results are not in our Hands

Hazrat Mufti Ebrahim Salejee (Daamat Barakaatuhu) mentioned:

We should not stress and worry about our actions producing results. We need to do our best in fulfilling our duties and thereafter leave the rest to Allah Ta‘ala. The problem comes about when we try to take things into our own hands. 

Source: Stepping Stones (Part One)