"V'natati mishkani b'tochichem, v'lo tigal Nafshi etchem."
(Bechukotai 26:11)
The 2nd half of the pasuk reads: "...and My Soul will not purge Itself of you." Rashi explains this as: "My Spirit will not be disgusted by you." Rabbeinu Ovadiah MiBratenura asks, what is Rashi coming to teach us? Of course Hashem won't be disgusted by us; He promised elsewhere that even when He is angry he will not leave us. Rather the pasuk is speaking to us in human terms. A person might have a friend which he likes and with whom he is on good terms with. However, it can happen that over time he will grow to dislike this friend becasue he is with him so much (I guess they weren't such good friends after all.). Hashem is telling this will never be the case with Him and us. He will never grow tired of us and leave. Rav Henoch Leibowitz tz"l, in his sefer Chiddushei HaLev, further asks; what is this coming to teach us?! Of course Hashem wouldn't do this! As R"O MiBartenura pointed out, this is something wich is part of human nature. This behavior is not shayach at all to G-d! So really he explains, it all has to do with us. People tend to apply their own nature (and faults) to others, or at least fear that others may have them. It is possible he writes, for a person to think that because he or another person might do this act of being disgusted by a friend and leaving them, that perhaps Hashem will do this as well. Of course this is imppossible. G-d is not man. Rather it is in our own human nature that we think these things. Therefore, this pasuk is coming to teach us that Hashem will never do this. No matter what we think, Hashem doesn't want us to forget this. He wants us to know straight out that the ahavah between us will last forever.