When Hashem revealed Himself on Mount Sinai, the People of Israel understood the secret of “We shall do and we shall hear” (Exodus 24:7). They realized they must commit to doing the commandments first. Through emuna, they were able to “do” before they could “hear” or understand.
When we fall from our spiritual level, we should know that this is sent from heaven. The purpose is to draw us closer to Hashem, to make new efforts to come closer to Him. We need to start serving Hashem again, as if we never served Him before. (Likutei Moharan, I:261)
The evil inclination’s gate of entrance into a person is via the eyes. By loading our eyes with Torah and emuna, we reinforce our good inclination. But, when we fill our eyes with the filth and other perversions rampant in society, we feed the evil inclination. (Garden of Purity)