Truly, there is a Heaven in this world, [and] whoever does not enter it, will not enter the Heaven of the next world.
(Ibn Taymiyyah)
To love Allah, to know Him intimately, to remember Him constantly, to find peace and rest in Him, to make Him alone the [ultimate] object of love, fear, hope and trust; to base one’s act on His control of His servants’ cares, aspirations and will- such is this world’s Heaven, and such is a Blessing with which no other Blessing can compare. It is by this that the hearts of those who love God are gladdened and that the gnostics find life. As their hearts are gladdened by Allah, so others are gladdened by them. For whoever finds his source of gladness in God, gladdens all hearts; whoever does not, finds nothing in this world but restlessness.
(Ibn Qayyim al-Jawziyya)