If we take the Four Noble Truths as knowledges to be penetrated, we have...
1. Know suffering
2. Know the cause of suffering
3. Know the cessation of suffering
4. Know the path leading to the cessation of suffering
Regardless of how you conceive 'heavenly', #1 & #2, #4 are hard to do because pleasures offset the need, desire and ability to see the causality involved in dukkha. Because of that lack of understanding, #3 becomes harder to achieve too. Heaven is a fools paradise.
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"The uprooting of identity is seen by the noble ones as pleasurable; but this contradicts what the whole world sees." (Snp 3.12)
"To argue with a person who has renounced the use of reason is like administering medicine to the dead" - Thomas Paine