It takes consistency to achieve a goal. We must remember that Rome was not built in a day. Can we feed ourselves for the whole week by eating too much in a single day? Never! In order to live we have to take food everyday. This is the way things works.
Many times we can't see any change in things despite of our hardest efforts. Some people put too much pressure on themselves to achieve the goal in no time but ultimately it harms them. Too much efforts bring tiredness that eventually forces them to quit.
Hence, patience is a vital thing while pursuing any goal. Shortcuts never work in some situations.