Faith gave Pi hope that he would be able to survive his ordeal. To explain, there were many instances in pi's journey where he felt his death was inevitable. When it seemed as though all hope was lost it was than his faith would provide Pi with hope; when Pi states, "The blackness would stir and eventually go away, and God would remain, a shining point of light in my heart" (209). He is expressing the fact that when his life was in jeopardy and there was no light at the end of the tunnel, God would always remain strong in his mind. Furthermore, when Pi's nutrition was becoming insufficient and he had the constant threat of Richard Parker on his mind, his faith would lead him through the days. For example, when Pi states, "It is pointless to say that this night or that night was the worst in my life. I've had so many bad nights to choose from that I've made none the champion" (273) you get a clear idea as to Pi's negative state of mind. As aforementioned, faith is what gives Pi the ability to overcome the sleepless nights and concentrate; when Pi goes through a night like this he would perform Hindu rituals and regular prayer techniques to supply Pi with hope. Pi's strong faith allowed him to persevere through adversity and gave him the unconditional mental strength to survive.
To live in solitude for a long period of time would drive anyone to the verge of insanity. This