I have mentioned here before that I have been (and still am) deeply influenced by science. I don't agree with some Buddhists who say the Dharma and science have nothing in common, or shouldn't in fact interact. I think the Kalama Sutra teaches otherwise. That is because it is an early form of the scientific method. It's similar in my mind to a, "scientific control" which allows one to access a particular process (Dharma practice) without too much bias from other influences. In Buddhist practice we're talking about such biases as our ego, an overly controlling teacher or peer pressure.
The Kalama Sutra gives us a framework to judge teachings by to see if they work. Including all the other sutras. In my opinion, it is the jumping off point for continued analysis of the other sutras. Others encourage starting from the Heart Sutra or the Diamond Sutra. I adore the Heart Sutra, and the others but I find that understanding the Kalama Sutra first to be a great help in understanding the others. But I digress. Do the teachings help me and the people around me suffer less? Do they help bring happiness and peace into life? The Buddha is advising us to test his teachings and those of all teachers that come after him because otherwise we are simply parroting someone else. It doesn't end suffering to simply be able to parrot someone else and recite all the teachings ever written or committed to memory. That's simple obedience and memorization. That takes you nowhere but back into the arms of the ego.
We have to experience it for ourselves. We have to let our minds marinate in their essence and observe how they affect our daily lives and interactions. If the teachings help us be nicer, happier and much more peaceful people; and if they help us suffer less than we know that what has been taught to us is beneficial and worth continuing to learn from. If, however, a teacher makes us feel worse about ourselves or contradicts our direct experience on the matter then you can know that the teacher is leading you astray.
The Buddha didn't want people to follow him or worship him but rather he wanted his fellow siblings (us) to experience the peace and relief from suffering that he experienced. Thus, because of this humble sharing of a sincere person he shows us that he is not Buddha because of some desire for self-aggrandizement or other stroking of the ego. Encouraging people to test his teachings and those who claim to follow in his tradition is the exact opposite of the blind obedience that some religious traditions engender. Where others want to tell you what to think, (and what to ignore) Buddha invites us to follow his map and see for ourselves if it leads anywhere beneficial. It's in our own hands and any teacher who won't encourage or allow for direct experience in their teachings is not one who would seem to fully understand the Buddha's invitation.
~Peace to all beings~