Under guardians. Paul used a new analogy to teach the Galatians about the situation concerning the possible.

He had already compared the law to a tutor (3.24), that is, to a servant in charge of the education of his master’s children.

And here, the apostle compared to law to guardian and tutor of a minor, we need help not only to administer and inherit properties but also protection for his goods and for himself, exactly because he is neither old enough nor able to do so.