In certain blogs and articles, I see a lot of fear being expressed over the synod on the family changing Church teaching concerning divorce and remarriage when the previous marriage is still valid. Especially when Cardinal emeritus Kaspar makes statements that seem rather... bizarre (to put it charitably).
Me? I have faith that the Holy Spirit is still on the job when it comes to protecting the Church from teaching error on matters essential for salvation. Since the Holy Spirit protects the Pope, it is reasonable to expect that, regardless of what may be said at the synod, the Pope won't be changing Church teaching from truth to error.
No doubt the media and dissenters will continue to misrepresent and raise false hopes (it happened before the release of Humamae Vitae where people wrongly expected the Church to change her teaching on contraception). But the Holy Spirit was active then, and is active now.
The Pope has asked us to pray for the synod. We should. Not in the sense of "Oh God, please don't let them teach heresy!" Rather we should be praying:
"Lord, please send your Holy Spirit over this synod so that Your Church may be brought to a deeper understanding of what Your Son has taught about marriage."