When you recite the Qur'an and contemplate its meanings, you take a positive step toward achieving happiness. Allah described the Qur'an as being guidance, light, and a cure for what is in the breasts of men. He also described it as being a Mercy.
(There has come to you a good advice from your Lord [i.e. the Qur'an, ordering all that is good and forbidding all that is evil, and a healing _for that [disease of ignorance, doubt, hypocrisy and differences, etc.] which is in your breasts...) (Quran 10: 57)
(Do they not then think deeply in the Quran, or are their hearts locked up [from understanding it]?) (Quran 47: 24)
(Do they not then consider the Quran carefully? Had it been from other than Allah, they would surely have found therein much contradiction.)
(Quran 4: 82)
([This is] a Book [the Qur'an] which We have sent down to you, full of blessings that they may ponder over its Verses) (Quran 38:29)
Reciting the Qur'an is blessed, as are acting upon it and turning to it for judgment and guidance.
A righteous person (and many have had a similar experience) once said:
"l felt that a cloud of depression and anxiety was hanging over me. I picked up the Qur'an and l read it for a period of time. Then, by Allah, the depression and anxiety disappeared and happiness along with tranquility took their place."
(Verily, this Qur'an guides to that which is most just and right) (Qur'an 17: 9)
(And thus we have sent to you [O' Muhammad] Rooh [an Inspiration, and a Mercy] of our Command. it (Qur'an 42: 52)