No, it is sufficient to perform Ghusl al-Janabah with a single pitcher of water. It is better to balance the concern over washing everything with the concern of not wasting water. Remember that Islam came from the desert! And in most of human history people didn't have showers. Also, maybe it is not good for your skin to take very long showers.
Of course, please don't start worrying that you are committing a sin by washing too much or using too much water! Just keep in mind that Islam is meant to be easy and that Allah is forgiving; as long as you are trying to do it correctly, He is not going to punish you if you accidentally miss one small spot, and eventually you will do another ghusl for one reason or another and that spot will be taken care of.
The soul will continue on its journey to the next phase of its existence, whether or not the body is buried. If it were necessary for a body to be buried in order for the soul to progress, the earth would be packed with lost souls since so many people throughout time have died and have not had burials!
However, it is likely that performing the appropriate funeral rites may ease the transition into the next phase of existence.
If you are concerned about someone's soul, you could pray for it.
These four quotations from historical sources should help answer this question.
Al-Hakim, in his al-Mustadrak, states that the Prophet kept confiding in 'Ali till the time of his death. Then he breathed his last.
When the body of the Prophet (s) was being given ghusl, according to Tarikh al-Khamis, al-’Abbas, Fadhl and Qutham turned the body of the Prophet (s) from one side to the other as Usamah and Shaqran poured water over it. All of them were blind-folded.
Ibn Sa'd narrates in his al-Tabaqat from Imam 'Ali that the Prophet had so enjoined that if anyone except himself ('Ali) had given him the funeral bath, he would have gone blind.
Ibn ‘Abd al-Barr, in his al-Isti'ab, quotes 'Abdullah ibn 'Abbas as saying that 'Ali had four such exceptional honours to his credit as none of us had, and he listed them all, the fourth being that he was the only person who gave the Prophet his funeral bath and lowered him in his grave.
Thank you for your question. The body, mind and ruh are all levels of the human soul. The body is the manifests the of the soul on the material plane. The mind is the manifestation of the soul comprising a number of levels and the ruh is a deeper aspect of the soul. They are affected by each other and this is most clearly observed in the mind, which receives information from the bodily senses and inspiration from the ruh.
May you always be successful
Allah (SWT) created our spirits before creating our bodies as we read in Hadeeths. Our spirit will leave our body when we leave this world in death. No question of incarnation at all. Every spirit is for the same person and will ever go into another persons body. Allah (SWT) does not lack ability to create spirits for every creature and does not need to incarnate a soul or spirit into another person or creature. It is also against justice to believe in incarnation because it amounts on imposing behavior of a person on another person.
Incarnation claim is a myth .
The Hadeeth says: Allah has created the spirits f people two thousand years before He created their bodies.
The spirits were living where ever Allah has made them to live. We believe in The World of Thar where all people were created but not in their bodies but before that.