What Truth is Judaism Based On?

The truth of Judaism stands on its tradition. But one can have little respect for tradition if every religion can claim its own tradition. It is therefore important to realize that no system of doctrine in the world has a plausible and uninterrupted tradition of G-d-given law except Judaism, upon whose tradition Islam and Christianity perforce lean, and it is important to realize that these latter two systems clearly disprove their own writings. Thus, there is one valid tradition, and this tradition is the sole source of basic truth. -- Rejoice, O Youth