Muslims (companions) misunderstood the speech of the Prophet on the day of Ghadeer.

But, those who did good to Allah and the people, Allah will give them reward by bestowing upon them His grace.

Shaking hands with the strangers of opposite sex is forbidden

Saying "Ameen" is permissible after reciting the Surah of al-Hamd in the Salat (but it's still not part of the Salat) especially with the intention of supplication.

On the other hand, Allah directs man to the spiritual purity through the act of giving that is represented by charity that the pious pays as "Zakat" and "Sadakat" almsgiving, and other financial obligations.

What is meant here is that man should not become immersed in loving the world which will make him forget the responsibilities that Allah had ordered him to hold, but he has to look at the world in its reality, in which it represents a place for obeying Allah.

Muslims (companions) misunderstood the speech of the Prophet on the day of Ghadeer.