I Peter 2:2

new-born babes--altogether without "guile" (Pe1 2:1). As long as we are here we are "babes," in a specially tender relation to God (Isa 40:11). The childlike spirit is indispensable if we would enter heaven. "Milk" is here not elementary truths in contradistinction to more advanced Christian truths, as in Co1 3:2; Heb 5:12-13; but in contrast to "guile, hypocrisies," &c. (Pe1 2:1); the simplicity of Christian doctrine in general to the childlike spirit. The same "word of grace" which is the instrument in regeneration, is the instrument also of building up. "The mother of the child is also its natural nurse" [STEIGER]. The babe, instead of chemically analyzing, instinctively desires and feeds on the milk; so our part is not self-sufficient rationalizing and questioning, but simply receiving the truth in the love of it (Mat 11:25). desire--Greek, "have a yearning desire for," or "longing after," a natural impulse to the regenerate, "for as no one needs to teach new-born babes what food to take, knowing instinctively that a table is provided for them in their mother's breast," so the believer of himself thirsts after the word of God (Psa. 119:1-176). Compare TATIUS' language as to Achilles. sincere--Greek, "guileless." Compare Pe1 2:1, "laying aside guile." IRENÆUS says of heretics. They mix chalk with the milk. The article, "the," implies that besides the well-known pure milk, the Gospel, there is no other pure, unadulterated doctrine; it alone can make us guileless (Pe1 2:1). of the word--Not as ALFORD, "spiritual," nor "reasonable," as English Version in Rom 12:1. The Greek "logos" in Scripture is not used of the reason, or mind, but of the WORD; the preceding context requires that "the word" should be meant here; the adjective "logikos" follows the meaning of the noun…

The general exhortation to holiness is continued, and enforced by several reasons taken from the foundation on which Christians are built, Jesus Christ, and from their spiritual blessings and privileges in him. The means of obtaining it, the word of God, is recommended, and all contrary qualities are condemned (Pe1 2:1-12). Particular directions are given how subjects ought to obey the magistrates, and servants their masters, patiently suffering in well doing, in imitation of Christ (Pe1 2:13 to the end).

2:2 Believers, who have been “born again” (1:23), are to be like newborn babies in naturally and regularly craving pure spiritual milk. Elsewhere in the New Testament, milk (in contrast to solid food) stands for elementary Christian teaching (1 Cor 3:2; Heb 5:12-13). This does not imply that Peter’s readers are new believers, however; here, it probably refers to God’s word in general.