Patience is the noose of the believer, tying him down: he may wander for a bit but always returns. It is the pillar of his faith to which he recourses, there is no faith for the one who has no patience. If, in such a case, it does exist, it would be severely weak. The one who has no patience is like worshipping Allaah at the edge of a faltering precipice: if good comes his way he takes comfort, but if trial comes his way, the world turns inside out and he loses both it and the Hereafter.
Ibn Qayyim: Idatu’l Sabirun wa Dhakiratu’l-Shakireen