The Nazirite Vow (6:1 ff)
What can we learn from the concept of the nazirite vow? A vow demonstrates the power given to a Jew by God, that he is able to take something ordinary and infuse with sanctity, binding it to God. Even a simple thing such as not cutting the hair for thirty days endows a person with special sanctity, since his intention was for the sake of heaven.
This teaches us that a person need not worry that he will not be given the ability of financial resources to learn Torah and perform mitzvos, for we see the immense spiritual power of a Jew, in that he can sanctity even an ordinary object so easily, simply by speaking.