Allah makes the deeds of the believers easier, and always shows them a way out from difficult situations by hidden or clear methods. Allah explains this fact in a verse of Qur'an that He helps the believers with unseen armies.
"You who believe, remember God’s goodness to you when mighty armies massed against you: We sent a violent wind and invisible forces against them. God sees all that you do" (Surat Al-Ahzab, 9)
The number of believers is few in every age and era but Allah states that He sometimes shows the number and strength of the believers to be more in the eyes of the deniers and this results in fear and apprehension amongst them.
"And when He showed them to you, when you met, as few in your eyes and He made you to appear little in their eyes, in order that Allah might bring about a matter which was to be done, and to Allah are all affairs returned." (Surat Al-Anfal, 44)
Allah reveals His spiritual support in the time of the Prophet (saas) to the believers in a time of challenge like this;
"When He caused calm to fall on you as a security from Him..." (Surat al-Anfal , 11)
With the statement of "caused calm to fall on you", it is understood that Allah gives a state like this to the sincere believers at the time of difficulty and sustains a peace of mind, a sense of confidence and gives stability to them (Allah knows the truth)