Son, understand that He in Whose Hand is death has control over life as well. He Who brings about birth brings about death as well. He tests you by putting you to troubles. He is our final refuge. See that you do not fail in His test. Believe that the world is subject to the well-established law of God that in the world man is awarded bounty as well as subjected to trials and tribulations. The final award is made in the Hereafter of which we have no knowledge.
"When a person dies, his works end, except for three: ongoing charity, knowledge that is benefited from, and a righteous child who prays for him."
Prophet Mohammed (PBUH)
"The best of what a man leaves behind are three: a righteous child who supplicates for him, ongoing charity the reward of which reaches him, and knowledge that is acted upon after him."
Sunan Ibn Mājah
"Every day two angels come down from Heaven and one of them says, 'O Allah! Compensate every person who spends in Your Cause,' and the other (angel) says, 'O Allah! Destroy every miser.'"
Sahih Bukhari