A fact that has been proven since old times, is children's
inheritance of their parents characteristics, and that these characteristics
are found in children's genes before they are transferred into their mothers'
wombs. They live with these characteristics as growing unborn children,
and after birth, with the growth of the child, these characteristics become
In fact, even nursing has an amazing effect on nursed
children's characteristics, as Imam Ali said:
"Don't have an idiot woman nurse your children, for surely nursing is a means for passing on contagious diseases."
Additionally, many detailed scripts have been published
regarding this law. In light of this, it is appropriate to briefly discuss
the biographies of the parents of Fatima (S), so we may derive a conclusion
about the magnificence that surrounded her life from the genetic viewpoint.
Because this is not the (direct) subject of our book, we will summarize
the subject as follows:
The chief of prophets and messengers, Muhammad Ibn
Abdulluh is the purest being, the most honorable creature, and the foremost
of all the world. It was for Muhammad's sake that Allah created all beings,
and there is not an honor, virtue or noble deed in the existing universe
that the great Prophet doesn't enjoy the greatest share of.
This is the least that can be said about the Messenger
(S), there is no exaggeration or extravagance in these words, rather
they are like saying: The sun shines, and honey is sweet. For this is the
Messenger of Allah (S) from whom Fatima Zahra (A) descended.
As for Lady Khadija, she was a beautiful, tall, light
skinned woman, considered noble among her people; she was wise in decision-making,
enjoyed a great deal of intelligence and sharp discernment. She bestowed
her brilliant insight of economical principles, especially in the export
and import field, on the trade market. This was Khadija the human, the
woman, and the wife; on the other hand, she granted thousands of dinars
to her husband to use as he saw fit. Thus, Khadija's financial support
had a great role in strengthening Islam during its prime days, when it
was still in the formation stage and critically needed material aid. Thus,
Allah foreordained Khadija's property to help Islam and fulfill its goals.
Allah's Messenger said in this regard:
"No property has ever been so useful to me as Khadija's."
While in Mecca, the Prophet used this property to
free slaves, help the needy, support the poor and rescue his financially
inflicted companions. He also paved the way for those who wished to immigrate;
all this through Khadija's wealth from which he spent freely during her
life; and when she died, he and her children inherited it. 
Therefore, the meaning of the Prophet's saying:
"Religion succeeded and became manifest only through
Ali's sword and Khadija's property," becomes clear.
Furthermore, her conduct throughout her married life
with the Messenger, is worthy of praise and glorification; for this reason
whenever he remembered his wife or her name was mentioned to him, he would
bless her and a feeling of sadness overcame him and perhaps tears would
run down his face in her remembrance.
Once the Prophet mentioned Khadija near Aisha, Aisha responded:
"She was not but a such and such of an old lady,
and Allah replaced her with a better one for you."
He (S) replied:
"Indeed Allah did not grant me better than her;
she accepted me when people rejected me, she believed in me when people
doubted me, she shared her wealth with me when people deprived me, and
Allah granted me children only through her."
 Amali al-Sheikh as Sadduq.