How much sense does the basic philosophy behind liberalism make?

I wouldn't say that "change" is the basic philosophy behind Liberalism. Change is the nature of life. Your body ages, your relationships change, your career changes and our country, economically, culturally and politically changes also. Change is an inevitable train chugging along the tracks. Liberalism attempts (often mistakenly, and incorrectly) to adapt to the change; Conservatism wants to just stop the train.