When we delve into Galatians 3:19, which states, "Wherefore then serveth the law? It was added because of transgressions, till the seed should come to whom the promise was made; and it was ordained by angels in the hand of a mediator," we enter a profound explosion of theological and biblical understanding. The Apostle Paul addresses a pivotal question of his time and ours: what is the function of the Law in relation to God’s promises? As we explore this verse, we uncover layers of meaning that speak to both the character of God and our relationship with Him.

First, we need to understand the context of this letter. The Galatians had been misled into thinking that adherence to the Jewish law was necessary for their salvation. Paul, the writer of Galatians, passionately refutes this notion by emphasizing grace over law, faith over works, and the promise of God over human effort.

In asking the question, "Wherefore then serveth the law?" Paul serves a dual purpose: he provokes thought while simultaneously asserting that the Law is of critical significance. The Law, he explains, was added "because of transgressions." The primary role of the Law was to make sin known. It was a reflection of God’s standard for holiness, delineating what constituted righteousness and what failed to meet that standard. In Romans 7:7, Paul writes, "I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet." Without the Law, sin could not be properly identified, and consequently, we could not fully understand the depth of our separation from a holy God.

However, the Law was never intended to be an end in itself. Its role was temporary, described as being "till the seed should come to whom the promise was made". Here, Paul introduces a pivotal narrative — the promise made to Abraham, pointing to Christ, the ultimate fulfillment of that promise. The Law acted as a tutor or guardian, guiding God’s people to the revelation of Christ, the true seed. It prepared their hearts for the New Covenant established through grace, highlighting their need for a Savior.

Moreover, this brings us to an important realization: the Law was ordained "by angels in the hand of a mediator." The Law’s divine origin underscores its importance; it wasn’t a mere construct of human will, but part of God’s sovereign design for humanity. The reference to a mediator points to Moses, who stood between God and the people, delivering God’s requirements. Yet, this mediation was limited. Moses represented the Law, whereas Jesus fulfills and transcends it. Christ, often referred to as the mediator of a better covenant (Hebrews 8:6), offers us direct access to God, devoid of the barriers that the Law imposed.

As believers in Christ today, we must embrace how the Law serves as a mirror reflecting our sin and need for grace, while also recognizing its role in God’s redemptive plan. The Law hasn’t been abolished; rather, it finds its purpose fulfilled in Christ. In understanding this, we can appreciate the weight of our depravity and simultaneously rejoice in the grace that overflows from the cross.

In a world that seeks to define righteousness through various standards, we are called back to the foundation of faith in Jesus Christ, the promised Seed. As we meditate upon Galatians 3:19, let us remember our response is not one of legalistic adherence but of grateful thanksgiving for the Law that led us to grace. Let us encourage one another, with hearts anchored in the promises of God, as we continually seek to grow in our understanding of His Word, delighting in the truth that we are justified by faith, not by works.