A believer is a guardian over himself: he accounts himself for Allah. Those who take account of themselves in this world will be audited lightly in the Hereafter. Those who take this issue lightly will find their auditing very difficult.
~ Imam Hasan Al-Basree
Never have I dealt with anything more difficult than my own soul, which sometimes helps me and sometimes opposes me.
~ Imam Muhammad Ghazali Rahimahullah