Bismillah. As humans, just because were muslims Al7amduLillah, does not mean were perfect. We have sins & faults like others. Allah swt knows this. If one Muslim is in need or is at a point of weak Iman, as a Muslim it is your religious duty, especially 4 sake of Allah swt 2 join in & pick that Muslim brother/sister up & place him/her under your wing. The most strongest thing u can do 4 that muslim brother/sister, is Dua. Cause, Sami Allahu liman Hamidah. Rabbana lakal Hamd.