When Imam Ali was asked about Faith in Religion, he replied that the structure of faith is supported by four pillars endurance, conviction, justice and jihad.

Take warning! He has not exposed so many of your sinful activities that it appears as if He has forgiven you (it may be that He has given you time to repent).

There are four causes of infidelity and loss of belief in God: hankering after whims, a passion to dispute every argument, deviation from truth; and dissension…

When you have to depart from this world and have to meet death (eventually), then why wish delay? (i.e., why feel nervous about death?)