Dought & clear, - (Belief) - What are the things that make faith decrease?.

What are the things that make faith decrease?
Praise be to Allaah.
The things that make faith decrease are as follows:
1.Ignorance of the names and attributes of Allaah makes a decrease in
faith inevitable, because if a man is lacking in knowledge of the
names and attributes of Allaah, he will be lacking in faith.
2.Neglecting to think about the signs of Allaah in the universe and
the signs of sharee'ah (i.e., verses of the Qur'aan and miracles of
the Prophet(peace and blessings of Allaah be upon him), etc.). This
causes a decrease in faith or at the very least it causes it to
stagnate and not grow.
3.Committing sins, because sin has a profound effect on the heart and
on faith. Hence the Prophet(peace and blessings of Allaah be upon him)
said: "The adulterer at the time when he is committing adultery is not
a believer."
4.Neglecting to do acts of worship, because neglecting to do acts of
worship causes a decrease in faith. But if the act of worship is
obligatory and a person neglects it with no excuse, then he is to be
blamed and deserves punishment. If the act of worship is not
obligatory, or it is obligatory but a person does not do it for a
valid reason, then he is lacking but is not to be blamed. Hence the
Prophet(peace and blessings of Allaah be upon him) described women as
lacking in reason and in religion, and he explained their lacking in
religion as being because of the fact that when they menstruate, they
do not pray or fast. But they are not to be blamed for not praying or
fasting during their menstruation; rather they are commanded not to do
these things at that time. But because they miss out on doing some of
the things that men do, they are regarded as lacking in this regard.
Majmoo' Fataawa wa Rasaa'il Fadeelat al-Shaykh Muhammad ibn Saalih
al-'Uthaymeen (may Allaah have mercy on him), vol. 1. p. 57