And of the people is he who worships Allāh on an edge.1 If he is touched by good, he is reassured by it; but if he is struck by trial, he turns on his face [to unbelief]. He has lost [this] world and the Hereafter. That is what is the manifest loss.
Translation: Saheeh International (English)
1 At the edge of his religion, so to speak, i.e., with uncertainty, hypocrisy or heedlessness.
Amongst people is a confused person who worships Allah in doubt. If good such as health and wealth come to him, he remains on his faith and worship of Allah, but if he is afflicted by an affliction through illness or poverty, he takes bad omen from his religion and then renounces it. He has lost his world, because his disbelief will never increase him in a share of the world which was not written for him, and he has lost his afterlife due to the punishment of Allah which will meet him. That is the clear loss.