Fr Spirago provides this commentary on the love of self in “The Catechism Explained”:
IX. THE LOVE OF ONE’S SELF
Among all classes of men each one is his own nearest neighbor. Consequently every man ought to love himself.
We ought to love ourselves because God wills it; further more because we are made after God’s image, redeemed by the blood of Christ, and called to eternal felicity in heaven.
It is God’s will that we should love ourselves, for Our Lord says: "Thou shalt love thy neighbor as thyself."In these words He declares the love of ourselves to be the rule and measure of our love of our neighbor. “Learn first to love God,” says St. Augustine, “then to love thyself; then thy neighbor as thyself.” God has not given us a special command to love ourselves, because every man does this in virtue of the natural law, and it is contained in the commandment to love one’s neighbor. We ought besides to love ourselves because we are made after God’s image. If we are to respect God s image in our neighbor, nay more, in our enemy, we must respect it in ourselves. Since, then, we love ourselves for the sake of God, it stands to reason that the right love of one’s self increases in the same proportion as we advance in the love of God. We must also remember that we are bought with a great price. “You were not redeemed with corruptible things as gold or silver, but with the precious blood of Christ” (1 Pet. i. 18). We also have a high calling, we are destined for eternal felicity. St. Gregory the Great thus beautifully expresses it : “Recognize thy dignity, O Christian! Thou art made a participator in the divine nature, a member of Christ’s body! Remember that thou hast been wrested from the powers of darkness, and destined to share in the glory of the kingdom of heaven!” Consider also that the Son of God was made man for us and became our Brother, that thus we have been made the children of God (1 John iii. 1); that the Holy Ghost dwells in us (1 Cor. vi. 19); that the angels minister to us (Heb. i. 14). These are all motives impelling us to love ourselves. Wherefore as the love of one’s self is in reality only the love of one’s neighbor applied to one’s self personally, to love one’s self is equivalent to esteeming one’s self at one’s true value (a matter of reason) desiring one’s own good (a matter of the affections) not injuring, but doing good to one’s self (in will and in action). This is the right self-love, in contradistinction to the false love which manifests itself in arrogance, conceit, discourtesy, license, etc.
The true love of one’s self shows itself herein, that we strive to attain that which will procure our real happiness; first and foremost our eternal felicity, and then such earthly things as are conducive to the attainment of eternal felicity.
The true lover of himself acts according to Christ s admonition: “Seek ye first the kingdom of God and His justice, and all these things shall be added unto you” (Matt. vi. 33). He will provide for his health, his clothing, etc., but without undue solicitude.
continued….