Some extracts from the will of Imam Ali (pbuh) to ponder on:
I advise you, and all my children, my relatives, and whosoever receives this message, to be conscious of Allah, to remove your differences, and to strengthen your ties. I heard your grandfather, peace be upon him, say: "Reconciliation of your differences is more worthy than all prayers and all fasting."
Remain attached to the Qur'an. Nobody should surpass you in being intent on it, or more sincere in implementing it.
Be in awe of Allah in relation to your salaa. It is the pillar of your religion
Maintain communication and exchange of opinion among yourselves. Beware of disunity and enmity.
Persist in striving in the cause of Allah, with your money, your souls, and your tongue.