To 'get to heaven' as you say is dependent on two things --
faith in the Manifestation of God in His Day, in other words in this Age in
Bahá'u'lláh; and good deeds, in other words living to the best of our ability a
noble life and doing unto others as we would be done by. But we must always
remember that our existence and everything we have or ever will have is
dependent upon the Mercy of God and His Bounty, and therefore He can accept
into His heaven, which is really nearness to Him, even the lowliest if He
pleases. We always have the hope of receiving His Mercy if we reach out for it.
(From a letter written on behalf of Shoghi Effendi to an individual believer,
January 12, 1957; compilation: ‘Lights of Guidance’)