Iman

When things get overwhelming and you started to become less kind, less patient and have more dzon to either your Maker or to the people around you, check your iman, nana.

Have you been distant from the Quran?

Have you been making less doa?

Have you been stuffing your own ego?

A close friend has once told me, if you started to be not so close to a friend previously dear to you, maybe one of you is having iman issue. As in, different iman levels can affect chemistry.

Iman. A big thing it sure is. 

Update:
Just a found a verse on Iman and the love in our heart.

"Sesungguhnya orang yang beriman dan beramal soleh, kelak Allah Yang Maha Pemurah akan menanamkan dalam (hati) mereka rasa kasih sayang."