What aspect of the hypocrites' condition resembles the "lightning" mentioned in this verse?

Imām Ibn al-Jawzī (d. 597 AH / 1201 CE) summarized the scholars' opinions in his book "Zād al-Masīr":

1. It is the enlightenment they gain from the guiding discourses and wisdom of the Qurʾān.
2. It is the light of their Islām which they manifest outwardly.
3. It is an example for what they gain by outwardly pretending to be Muslim such as the protection of their lives, because it is like a lightning bolt in its duration compared to what lies in store for them in the Hereafter.