بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ
In the name of Allah, the Most Beneficent, The Most Merciful*
*Assalam Alikum Wa Rahmatullah Wa Barakatahu*

 Iman or faith is the most important pillar in islam cause without faith, whitout beleiving in what we are doing, we can not live happy and we can not succeed in our life.

firstly, beleive in oneness of Allah indicated by coran      
" suret (al ikhlas/the unity)":say he Allah is one,Allah is he on whom all depend,he begets not, nor is he begotten and none is like him''

Signs of weak Fath :


·        Committing sins and not feeling any guilt.
·        Having a hard heart and no desire to read the Quran.
·        Feeling too lazy to do good deeds, e.g. being late for salat
·        Neglecting the Sunnah.
·        Having mood swings, for instance being upset about petty things and
bothered and irritated most of the time.
·        Not feeling anything when hearing verses from the Quran, for
example when Allah warns us of punishments and His promise of glad tidings.
·        Finding difficulty in remembering Allah and making dhikr.
·        Not feeling bad when things are done against the Shariah.
·        Desiring status and wealth.
·        Being mean and miserly, i.e. not wanting to part with wealth.
·        Ordering others to do good deeds when not practising them
ourselves.
·        Feeling pleased when things are not progressing for others.
·        Being concerned with whether something is haram or halal only; and
not avoiding makroo (not recommended) things.
·        Making fun of people who do simple good deeds, like cleaning the
mosque.
·        Not feeling concerned about the situation of Muslims.
·        Not feeling the responsibility to do something to promote Islam.
·        Liking to argue just for the sake of arguing without any proof.
·        Becoming engrossed and very involved with dunya, worldly things,
i.e. feeling bad only when losing something in terms of material wealth.
·        Becoming engrossed and obsessive about ourselves.

how to increase our faith then ?         

 - Recite and ponder on the meanings of the Quran. Tranquility then
   descends and our hearts become soft. To get optimum benefit, remind yourself
   that Allah is speaking to you. People are described in different categories
   in the Quran; think of which one you find yourself in.
   - Realize the greatness of Allah. Everything is under His control. There
   are signs in everything we see that points us to His greatness. Everything
   happens according to His permission. Allah keeps track and looks after
   everything, even a black ant on a black rock on a black moonless night.
   - Make an effort to gain knowledge, for at least the basic things in
   daily life e.g. how to make wudu properly. Know the meanings behind Allah's
   names and attributes. People who have taqwa are those who have knowledge.

   - Attend gatherings where Allah is remembered. In such gatherings we are
   surrounded by angels.
   - We have to increase our good deeds. One good deed leads to another good
   deed. Allah will make the way easy for someone who gives charity and also
   make it easy for him or her to do good deeds. Good deeds must be done
   continuously, not in spurts.
   - We must fear the miserable end to our lives; the remembrance of death
   is the destroyer of pleasures.
   - Remember the different levels of akhirah, for instance when we are put
   in our graves, when we are judged, whether we will be in paradise or hell.

   - Make dua, realize that we need Allah. Be humble. Don't covet material
   things in this life.
   - Our love for Subhana Wa Ta'Ala must be shown in actions. We must hope
   Allah will accept our prayers, and be in constant fear that we do wrong. At
   night before going to sleep, we must think about what good we did during
   that day.
   - Realize the effects of sins and disobedience- one's faith is increased
   with good deeds and our faith is decreased by bad deeds. Everything that
   happens is because Allah wanted it. When calamity befalls us- it is also
   from Allah. It is a direct result of our disobedience to Allah.