The paper argues that Toni Ronnow-Rasmussen's fitting­ attitude analysis of 'good' and 'good for' allows us to interpret and justify Kant's Formula of Humanity (FH) in a constructive way. His classification of 'good' as a non-relational intrinsic final value and 'good for' as a relational extrinsic final value sheds light on two main features of FH, namely that it requires us to display a specific attitude to human beings, while also obligating us to recognize this value in the relational dimension. Based on a reflection of what attitudes toward persons are fitting, we might well come to endorse that persons are "ends in themselves" and merit respect and recognition. I then argue (by way of an ethical reading of Kant' s demand to leave the state of nature and move to a rightful civil condition) that we have, in addition to a fitting attitude, deontic normative reasons (not mere pro tanto reasons) for making this very attitude toward persons the principal standard for our relations to others and to ourselves.