Eternal life of believers
The Holy Quran gives a graphic description of the eternal life of the successful people in the hereafter. These descriptions are given only for our limited understanding, the matter of fact is that the bounties of the hereafter are unimaginable by our worldly standards. The inhabitants of the Paradises will get be provided with everything they will wish for; and above all the bounties, they will be granted The Pleasure of Allah سبحانه وتعالى. This will be the ultimate success and triumph that anyone can get; and will last forever.
The basic criteria for success are belief in Allah سبحانه وتعالى as the only one worth worshipping and the deeds acceptable to Him. Anyone, who will present on the Day of Judgement with these two characteristics will be rewarded by Allah سبحانه وتعالى with eternal success and will enter the paradise by His blessings.