These are some basic rules now I can remember:
يَا أَيُّهَا الَّذِينَ آمَنُوا لِمَ تَقُولُونَ مَا لَا تَفْعَلُونَ /
كَبُرَ مَقْتًا عِندَ اللَّـهِ أَن تَقُولُوا مَا لَا تَفْعَلُونَ
O ye who believe! Why say ye that which ye do not? / Grievously odious
is it in the sight of Allah that ye say that which ye do not. [61:2,3]
أَتَأْمُرُونَ النَّاسَ بِالْبِرِّ وَتَنسَوْنَ أَنفُسَكُمْ وَأَنتُمْ
تَتْلُونَ الْكِتَابَ ۚ أَفَلَا تَعْقِلُونَ
Do ye enjoin right conduct on the people, and forget (To practise it)
yourselves, and yet ye study the Scripture? Will ye not understand?
[2:44]
By which Allah warns the believers not to advise the others while themselves are not behaving according to that advice. For example someone who lies frequently is not allowed to warn the others that lying is forbidden.
According to all the Shia scholars a Muslim "must learn the issues (Masāil) which are of his daily need or he must know the way to perform them in accordance with precaution", ref. [the issue number 12].
Also you may find the following advice from Grand Ayatullah Bahjat useful, source is here:
Hujjatul-Islam Lutfi says, “I went once to Sheikh Bahjat following the
morning prayer and asked him to admonish me. He said, “Be callers upon
people to the path of Allah but not with your tongues.” It seems, the
author says, the sheikh wanted to attract the attention of the seeker
of the admonishment, who is one of the men of spirituality, to the
best call: the practical call.
In the Name of the most Exalted One
I ask those who seek
admonishment this question: “Have you acted upon the admonishments
which you have so far heard?” Do you know that Allah Almighty lets one
who acts upon what he knows inherit the knowledge of what he does not
know? If one does not act upon what he knows, is it right that he
expects more of such knowledge? Should the call to Allah be by the
tongue [alone]? Did Allah not order us to be callers to Him but not
with our tongues? Should we learn the reaching method or do we know it
already?
Can we obtain the answers to these questions in the following verse of
the Holy Qur’an: “As for those who strive in Our (cause), We will
certainly guide them to Our paths, for truly Allah is with those who
do right” (Qur’an, 29:69)?
And we can get it in the following tradition about the Infallible One (as): “Allah will let one who acts upon what he knows
inherit the knowledge of what he does not know” and “One who acts upon
what he knows will be spared what he does not know.”
May Allah grant us success to act upon our knowledge and to be
cautious with regard to what we do not know. Indeed, my success comes
only from Allah. Upon Him do I rely, and to Him do I return, and peace
be with you, the mercy of Allah and His blessing. Holy Mashhad Rabi`
al-Awwal 1417
[Ayatullah Bahjat also said:] Since Day One, the ignorance of Iblis was the reason for Adam’s
problem. Satan said, “Then, by Your might, I will put them all in the
wrong, except Your servants among them, the sincere and purified ones”
(Qur’an, 38:82-83). Iblis was ignorant, although before then he used
to be a worshipper but not a man of knowledge, and his deed was
incomplete. Did he not say to Allah Almighty when He ordered him to
prostrate to Adam: “I am better than him: You created me from fire,
and You created him from clay” (Qur’an, 38:76)?! This was the minor
argument of Iblis. As for his major one, it is his reasoning that
anything created out of fire is higher, whereas anything created out
of clay is lower! We must ask: Why so and according to what proof?!
This outward outfit is not angelic. Look at the symmetry and beauty of the peacock and the difference between it and the other
animals. Likewise, the soul of man cannot be compared with that of
jinns or of the angels. The human soul can ascend to whatever Allah
wills even if it is outfitted with an outfit made of clay. An outfit
does not make an attribute. If one wears a mantle made in Naeen and
another wears a mantle made in Afghanistan, will that be an evidence
for one’s inferiority and the other’s superiority? When we, too,
become ignorant, we will then be like Iblis, and we will stray as he
did. The characteristic of straying is that it transgresses; i.e. a
staying person causes others to stray, too; so, beware of ignorance.
It is ignorance if that person says that the Holy Qur’an contains this verse: “It is He Who has spread out the earth for (His)
creatures” (55:10); therefore, there is no difference among people;
all are equal in possessing and utilizing the earth. He does not know
that the wording of the verse connotes an outcome and benefiting, and
he also does not know that he must take note of the other verses which
interpret this verse. These ignorant folks cause others like them to
stray. They come and bring the Qur’an with them in the beginning, but
their goal is to take away the Qur’an from the hands of people in the
end. There will be none to object when they say, “Burn the Qur’an!” We
laugh at this matter, finding it amusing, but the truth is that unless
we are strong in our argument, they will chase us out. They spend
wealth and buy these ignorant folks. The result is that this ignorance
will create a new religion. Did not one Bahaai person say that the
name of “Sayyid Ali Muhammad al Bab” exists in your Qur’an, too, in
this verse: “Hee-Meem-Ayn-Seen-Qaaf” which means “The Qaim is Sayyid
Ali Muhammad” when it is read from left to right?! So, we nowadays
need knowledge and deduction more than anything else because the
matter is one of creed. We have to stand in the face of this ignorance
and these imported ignorant folks; they want to train their henchmen
and spend their wealth on them; so, we have to learn logic very well
so we may be able to answer them; otherwise, the wolves will eat us
and digest us.
