Derishas Tzion - idealism

I bought a copy of R' Tzvi Hirsch Kalisher's Derishas Tzion a few weeks ago and have been going through sections when I can steal a moment or two. If you like Ain HaBanim Smaicha, get a copy. The Mossad haRav Kook edition has many letters exchanged between R' Kalischer and the likes of R' Akiva Eiger, Chasam Sofer, Malbim. Another of my pet peeves is the loss of idealism in our community. You look at a sefer like Derishas Tzion and realize these people were thinking and dreaming of rebuilding Eretz Yisrael, being makriv korbanos, etc. when realistically there were no practical means of doing so at hand. Yet, those dreams eventually became reality. What are the "leaders" today thinking and dreaming about? How to stop people from reading certain books lest they be led astray? Maybe there would be less danger of being led astray if more vision was provided that could inspire.