In regards to the second commandment which is that we must...
In regards to the second commandment which is that we must reduce the number of sins we commit, we see that there is a direct relationship between the sins we perform and ease at the time of death and it is for this reason that the Prophet (S) has spoken these grand words. At this point, we ask: why do people fear death? Simply put, people fear death because they feel it is complete annihilation and non-existence and because they think that death is an end to all things.
Since they do not see death as a journey through a valley towards perpetual existence and a much more spacious world (compared to this world), they have a hatred and fear of it! It is natural for a person to fear darkness and annihilation - however, if one was a true believer (Mo`min), then he would definitely not fear death! Truthfully, one of the greatest services which the Prophets (as) assisted mankind with was taking away the fear of death from them.
Of course, it is very well possible that a person is a true believer and has firm conviction in the next life, however since his book of deeds is blackened over with sins, he would fear death. In such a case, there is no way out for this person, except repentance from his sins.
Therefore, being freed from this world has no grief or hurt associated with it! Of course, this sentence can be interpreted another way which is that due to continuously sinning, when the time of death approaches, death becomes very difficult for the person to bear. Since the person had developed a strong affinity and very intense relationship with the material world, at the time of death, when the soul is coming out, death would be extremely painful to bear!
However, if one had not committed sins, then it would be very easy for the soul to leave the body. At this junction, we see that the Prophet (S) focuses his attention on the next life and the fact that one must not exert his efforts to fulfill the affairs of the material world.