That is where we neeed guidance.Man has not been able to solve the eternal problem of good and bad, vice and virtue. All he has done is that he has created a lot of relative values that are only applicable in a particular situation and is bound by the limits of time and space. God has facilitated us by sending His eternal guidance through his exalted Messengers. These Messengers always insisted on values and proved their utility not merely through lectures and sermons, but by practically applying them and proving their positive results. All Messengers were human beings and as such had to leave this mortal world. The last exalted Messenger ensured that the permanent values of the Divine guidance would always be with us in the form the Quran.
You are right in saying that living a good life is difficult, but we can try to make it a bit convenient by following the dictates of the Quran and sit back.Allah has promised to help us in all matters.Just assess your life and you will see the numerous occasions when difficult problems came your way, but were eventually resolved by God.
Let us have full faith in God and try to live our lives according to his Directives.